I have not had it long at all but my back problems have come a long way already ! I was told I needed to exercise my core but I was limited in what I could do because of pain. Rebounding is truly working for me. Its low impact and this bellicon is not jarring like other cheaper rebounders. Yes its an investment but ive spent way more on other things that just made me feel worse!! Its a very smoothe bounce and just plain fun. I highly recommend it. Keep bouncing !!