I have owned this seat for around 3 months now, and can only praise it's engineering.
I use it with the Logitech Driving Force GT, and it fits like a glove, Comfortable, easily adjustable, and very well built and robust, Overall excellent.
It was easy to assemble, and looks the part, One small gripe would be it doesn't fold up much, so you need plenty of room to store it, no shoving this under the bed, but that doesn't bother me too much.
It slides and tilts in the same way as a normal car seat does which is what drew me to it rather than the GameRacer seat option, it didn't take long to find the optimum driving position, and was easily adjusted during that time whilst sat in it, I've made some velcro straps to hold all the cables neatly to the frame which helps with the overall comfort.
All in all this has made my F1 experience 300% better, and GT5 with the 3D glasses on is absolutely awesome, a luxury, but if you can afford it why not indulge.