The Best I've EVER used!
NRG Grasshopper Massage Chair
I've been using this chair for 4+ years and have had absolutely no problems with it. No break-downs in vinyl, screw works like it should, easy to adjust and lock face rest, etc... Very easy and quick to set up (1 minute is my record) and take down is even easier. I've had clients for all shapes and sizes on my chair and it has adjusted perfectly to each and every one of them. The only downside to this chair is you can't use it for pregnant clients because of the center bar, but in reality, therapists shouldn't be working on prenatal clients that are 6+ months in a massage chair anyway, bad for circulation.
I've had the unfortunate pleasure of using earthlites and oakworks chairs and all I can say is CONFUSING, they take too long to set up and take down, the vinyl is cheap and the pads break-down.
All in all, I stick with NRG for all my equipment for personal and business use.