bought this as a gift for my husband who has back problems, had surgery a year ago and still is going through excruciating pain. First of all, this gift, that came before he left for work, so the surprise was right on time..lol..with that being said and done, he didn't wanna leave for work, kept saying he wish he was home putting it together so he can get in it to try out..lol.So I put it together, which was Eeee--Zeee!:-) and of course had to be the tester. Smh(Shaking My Head) The, chair feels so good, its comfy and the vibrating and options are wonderful, #3,6,and 8 are my favorite. So i txtd him to let him know this info and of course that made him more anxious of getting home. when he did he didnt wanna get out of it..lol.. he loves the chair, ME and so do I.. THanks Wayfair (singing the jingle..."Got just what I need")