Very happy with Topxen VPS service!
I can point out that it was very hard for me to choose VPS hosting provider. Found Topxen.com and decided to give them a try. 100% sure that I made good decision. My site is always up and running. When I update my site, changes are immediately noticeable. The VPS control panel is simple and clear and works just fine. TopXen offers a choice of the most common shared hosting control panels and even installs them for you. I chose a free one, Kloxo and it's well-organized and user-friendly and easy to navigate.
Their Customer Support was very helpful and responsive.
The scripts that I had selected for installation were just right for me.
Their platform is Citrix XenServer - really good one I must say. It's totally different than virtuozzo and openvz and works very very well with the hardware and gives me great performance and stability - nothing crashes :)
They are a lovely bunch of people, quick to serve and extremely helpful, i recommend them in a heart beat! You won't go wrong with them.
Very happy with price, service & support.