Its been a few years since but I have had good experiences, although its a bit of a walk when you return the car, The confusing thing is the collision waiver (I think that's what it is called) but they offer an all in rental price these days.
All much of a muchness. If you look at reviews you will find nearly all have both good and bad. Whoever you use make sure you have extra insurance to cover the excess. Maybe have a separate policy but sort it out before you go, not when you arrive at the desk and they tell you the excess is €1,000 or you can pay €12 a day for their cover.