CarDelMar 

easy to book. reasonable prices. Missed a a 5 star as I could pick up or drop off at terminal 3

The link to download T&Cs is broken. It shows wwwdotcardelmardotcodotukslashfileadminslashcdmslashdownloadsslashCDM_Terms_Conditions__UKdotpdf Following it kills the booking page I had almost completed. I had to start all over again.
As for the car hire, we will have to wait and see.

Disgusting company. Don't let these thief's steel money from your kids mouths.
I was late by 20minutes and they cancelled my 2 weeks booking. My 4kids and wife were left stranded at airport as no other 7seaters were available. Over the phone this was cancelled as they were based outside terminal. I tried numerous times to speak to them but just rudely put phone down.
Please avoid these holiday wreckers.
Close them down please.
Never got any of the £700 I prepaid. As they said I was late. So if you prepay for 3 months and are slightly late you will lose thousands..
Does that seem right.
Don't use these people. Car del mar are daylight thiefs. Thanks for ruining our holiday...

A joy to use.

Booking was extremely easy. The only (slight) problem was that my inbound flight was with Easyjet, and I found the instructions on entering the flight number to your satisfaction somewhat ambiguous. But there were only three ways to interpret them (and it was my third attempt that was accepted, naturally). But why can you not just map [ICAO code] EZY to [IATA code] U2 automatically? It is hardly a complex programming task! Certainly simpler than rejecting the submission and issuing an ambiguous error message.

Of course, I have yet to receive confirmation that the requested vehicle is actually available, but I am moderately hopeful of success.

Long wait. Rude staff member who, when I complained about the car offered threw my card and licence back at me and told me to get a car somewhere else - despite the fact that I had prepaid and was there in the airport. Forced to upgrade at +£70 due to shortage of cars. Car given was very dirty.

Also charged £1300 to my card "in case of damage" - there wasn't any of course - now I have to wait for the refund.

Charged for £75 fuel, even though it was a full to full agreement - again I now need to wait for a refund.

I am pretty furious about the whole experience - it seems these car rental companies are getting worse and worse at trying to find tricks to get more money out of you - to illustrate the point, the queue at the desk was an hour, but for £30 you could get a priority pass! What a total rip off.

Shocking

very disappointed to get to after the payment stage to be told I need to wait 3 days for confirmation there is a car!
Ridiculous and unacceptable

Would be 5 but form wouldn't accept the international dialling code from the UK. Also thought there was a loyalty system with Cardelmar but we have used them four times now and no loyalty points. Have still to get a nice new car, so far have had old battered ones!! Despite this the customer service we have received from the guys at the desk at the airport are second to none. That's why we come back !!

5 stars: Excellent – no reservations, I would recommend this company to anyone.

Avoid at all costs!! I booked a car in Liverpool through cardelmar. At the airport, the hire company didn't accept my credit card and told me to contact cardelmar to either transfer the booking to another company or ask for a refund.
Cardelmar's employee was extremely unhelpful over the phone and said that they couldn't do anything to help me.
The whole company seems to be a scam to get their customers' money by using extensive small print in their contracts.

Never again! I booked a car and turned up at the airport desk 2 hours after the booking time. No one was at the desk, so I called the CarDelMar "hotline" for help. Terrible response from the CarDelMar representative, who told me that they could not help and that because I was not on time, the rental firm had the right to cancel the booking - but, unbelievably, CarDelMar claimed they would still charge the full amount for the rental. No effort was made to help us contact the rental company, and the woman on the phone was very defensive referring to the terms of the contract, which she claimed allowed them to do this. After suffering this kind of diabolical customer service, I would never again deal with CarDelMar. Fortunately, after a few more minutes of waiting someone arrived at the rental desk and we managed to get our car - no thanks to CarDelMar. I would strongly recommend avoiding CarDelMar and opting for a more reliable and customer oriented company, even if it costs a little more.

Terrible company - Terrible communication
No explanation of how to get to the office which is not in the airport. You have to get a shuttle bus to a hotel but they don't tell you which one or even the address. I had to wait for 1 hour at the office to speak to anyone
The car I ordered was not available and they offered a 'larger vehicle'
This turned out to be a Renault Traffic minibus
By the time I was shown it there had been so much delay I considered taking it but could not get it out of the underground car park. A member of staff 'Santi' who smelt like he had been drinking then drove the van and damaged it and blamed me and I was forced to pay for the damage or they would not provide an different car.

How come you give me a price that is very good and only after payment i understand from you its not a guarantee that I will have a car??? what kind of service is that???

I booked a car in March for August in Athens. When I went to pick up the car they told me the reservation was cancelled. I called car del mar and they told me there was nothing they could do about it. The company cancelled the rental and I did not get a single email letting me know.

Quick and efficent site. Easy to use and well laid out

They advertise cars that are not available, then just cancel your booking. Time waisters! Careful as you might not have a car booking at all.

I fully paid and insured a car for 3 weeks to pick up on arrival at the company Sixt in funchal. Upon arrival to pick up car I was refused the car due to not having a credit card. About 20 mins later I called Car Del Mar explaining my situation yet they done nothing to help but to say I will not get my money back. I told them that I will show up with a credit card. The next day I showed up with a credit card yet they told me that my booking was canceled by Car Del Mar. I called Car Del Mar every day possible yet they did nothing to help and were rude hanging up on my face and saying "I'm ending this call, goodbye" and refusing to let me speak to someone of a higher power. I also tried to file a complaint and they wouldn't let me. I've traveled the world and never had this problem. I've lost nearly €1000 without getting anything back only arrogance. Never again using this company and filing a complaint to higher powers. Even after telling them I would try to talk to higher powers they replied with "good luck with that". Rude, arrogant, lazy, terrible people.

I would have give them 0 stars if that were possible. On returning the car five days early, I was told that I would not be getting a refund. My fault for not reading the fine print. But be warned .. 1 or 0 starts for the appalling and rude customer service for not even discussing options ..Obviously never going to use them again