I purchased the Life Fitness X8 elliptical on 10/23/2010. It had a clicking noise in right rear. Serviceman replaced a coupler on 12/10/2010. Heard more noise: serviceman on 4/20/2011 stated writing on belt causing noise. (I can live with that). However, noise again coming from right rear where coupler replaced. I did extensive research before purchasing. I should've bought a Precor elliptical trainer instead.