My partner recently bought me one, and i've just completed my first week using it. I use it for 30 minutes, 4 times a week in the evenings, which ends up being 7.5 mins running and the rest walking.
I am quite unfit at the moment, so i am walking for 5 minutes, then running for 2.5, then walking etc etc. I hope to take the running up to a total of 10 minutes this week, and then the week after i might start playing with the incline.
I have set mine up in the back spare room, with my telly and cd player, and also have some free weights, a mat and fitball, but so far i've been too buggered after getting off the tready to even contemplate using the rest of the equipment!