I have the TC5000 and love it. I am a beginner at this exercise thing and am quite a bit overweight, but the Treadclimber is so gentle on your body I don't have the aches and pains some exercizes give me. I like that it can be a treadmill, stairstepper, or the combo treadclimber.  It is somewhat loud but I just crank up the MP3 player and enjoy. Definately worth the… read full review »