I really wasn't sure if I was going to like these but the spacing is better than I expected and the tension they come with feels natural. They are plug and play compatible with Windows 7, 8 and 8.1.
On a wooden floor you'll need to use the velcro strips supplied although I'm not convinced they'll last more than a few days, I've screwed mine down (Carpeted floor) and they are rock solid, wonderfully smooth movement with absolutely no worries about precision, if anything they are slightly too sensitive, so I've had to add a deadzone to a couple of games. Over all though absolutely perfect for any gamer who's looking to add a couple of axis off of the stick/throttle.
They are independently configurable in most games i.e. it presents a different device axis to the software. As such I'm using mine for throttle (toe brakes) and Roll in Elite: Dangerous beta.