Air tag fits in nicely and the product is well finished. Fits easily under the saddle although wouldn't take more than a hacksaw or a lever to get it off I suspect. Careful not to over tighten the securing bolt as this actually loosened the fit. I tightened it ti the recommended torque but had to secure it with two cable ties on the rails to stop it from moving. Might be better if the clamp that is exposed was made from hardened metal. Not a bad product for the money just not the most secure item available.
Quality: 4
Value for money: 4