Just assembled mine today. The base tilt arm was not included in my package, so I'll have to get Customer Service to send me one. Also, the threads in the brackets connecting the upper part of the chair to the base are some of the worst, yet still functional threads I've ever had to deal with. I'm assuming they're poorly cut since all the bolts worked fine in the other sections of the chair. But as of today, I like the chair a lot. We'll see if it holds up.