Installed iOS 11 Beta 2 on my iPad last night. Man this OS is buggy! I have a hard time believing they'll sort this all out in just a couple of months. Maybe it won't be AS buggy, but there are so many UI glitches. Icons overlapping, stuff getting stuck for no reason, general slowness, frame drops everywhere and other graphical oddities.
Before anyone chimes in... Yes, I know it's a BETA. I get it. I know what betas are for, but hear me out. Based on my past experiences, the final release is still pretty buggy and you'll have to wait 6 months to a year before it's finally polished and then they roll out another major OS and get the bugs flowing again.
I think I'll stay on 10 for as long as I can.