I have been a foot-dragger at times, too, but 12 really blew me away. I had the betas on my Mini from DB1 and every beta was an improvement over 11 and 10, at least in my opinion/for what I use the iPad for. I had stayed away from 11 mostly because I thought it was a pig compared to 10 (which wasn't that nimble, either). I think the iOS engineers really got an awful lot right with 12. You know that if you install it you can't go back at this point, though I don't think you'd want to - as long as you don't have any 32 bit apps that haven't been updated. I lost one 32 bit app but it was worth it.