You do have to take multiroom if you want to get the UHD content. Thats the reason I've got it- although the second box is just used to feed a Slingbox for occasional outside UK viewing, its also handy to have a limit of 4 registered devices for Sky Go. I suspect I wouldn't have got the discount I did on the package a whole if I hadn't taken multiroom. The fact the equipment is rented doesn't particularly bother me- given that even the basic recording functions require a subscription I wouldn't have a use for the box if I weren't paying.
It feels at times like theres a few too many menus to step through to get to certain functions but aside from that and the odd other minor gripe, I like Sky Q. The on screen menus look good, and the system is smooth and responsive. I haven't kept count of the number of times its crashed in the 18 months I've had it, but its very few, certainly no more than the Sky+HD box did.
I wasn't keen on the touch remote at first, but the installer was right when he said to stick with it and that after a while most people prefer it. Thats my experience as well- it makes its easier moving forwards and backwards in a recorded programme and moving through the menus and EPG