Yeah, I was surprised to find the gravity boots didn't work either. The teeter brand is very good I think---although it is the only one I've tried so far. I am going to do just what you said---go to the stores and try out other models. I imagine all the models that require your feet to be in tight restriction are going to be a problem for me though. So I don't think it's that teeter is a bad brand at all---it's just me and my bony sensitive feet and ankles. Anyway on height, weight and age, I'm 5'6, 115, 32. If I find one that works for me, I'll report be back so in case someone with my same problem comes along.