I got mine several years ago. It's a foldable type which is nice. I used it daily for months when I first got it, then 3 days a week when I added an aerobics with weights routine.
I didn't lose much in the way of weight when I used just the treadmill mostly inches, but when I added a diet I started losing. Then adding the weight training and it came off faster. Endurance increased, definitely.
I took a sabbatical from dieting and exercise, much to my regret, and when I went back to the treadmill, the motor broke.
DH eventually got around to fixing it and I got back in earnest. Then I broke my foot. I actually look forward to getting back to it. Last time I used it I was running, not walking.
ANYWAY. My point is that I used it and it was a great gateway to fitness for me. To avoid the boredom, I used CDs and books on tape to keep me going. I don't like tv all that much and to hear it over the motor you have to keep it pretty loud.