I have purchased a ton of rollers, yoga wheels and other back products claiming relief from pain. My lower back gives me lots of issues and is so tight most chiropractors can not adjust it. I stumbled upon this wheel and gave it a try. The construction of the 6 inch wheel seems to be excellent but I guess time will tell. I’ve been using it usually 2-3 times a day just for a few minutes a day for less than a week. I have noticed great movement in my lower back that has really provided some welcome relief. The size of this wheel provides a great travel companion or to slip in your gym bag. If you have a really tight back I highly suggest you give this one a try. It may take a little getting use to but I think you are going to love it, I do!