I just got one also. Same questions.

I've got 3 of them - one at work, one in home office and one in the living room. The living room one is also travel-sized so it goes with me when I travel. I'd say between the 3 of them I probably roll about 15-20 times per day - mainly my quads. Very rarely is it for more than a few minutes at a time. The one that gets the most use is the one at work while on conference calls. I've also use a foam roller just about daily, sometime more, mainly on my back and hips.