I was one of the first customers to get one and used it to play through Portal 2 (which was bundled with it) and really liked the experience. Playing a little bit Civ 5 in between was also good.
After that I sold it (even with a small profit) because it felt cheap but mostly because it lacked a rechargeable battery and headphone jack, both of which the Xbox One controller has (and every modern controller should have).
I would buy one if they shipped it with a rechargeable battery, headphone jack and a build quality comparable to the Xbox One controller (which is really gread imho) for around the same price.