Well,it floated my boat....
OK, haven't updated release since June, (and temporarily don't use that computer at the moment) I liked it.
Snappier to me than Win-7 SP1.
But, I only use Firefox, LibreOffice, Cadsoft Eagle, Notepad+ and Atmel Studio 6,2 (Plus a few necessary addons - Arduino IDE, Flip, Dropbox etc) - all of which worked flawlessly.
As for Caterina, Cortina, Cornea, Catrina, whatever...I can't presently use it (her?) in my locale (Non-US) so I think a blessing.
I SHALL be installing it, but dual-boot, if the release ISO lets me. Certainly that's how I used it previously, but I never went back to Win-7, IIRC.
And, as I'm on the dole, with a hobby of scouring junkyards*, I found a rather nice big Acer Travelmate dual-core effort slung away. After getting it to (finally) boot (stuck key), and removing every virus, trojan, malware, stuxware etc. known to mankind, then using Vistalizator (www.froggie.sk/en/index.html) to convert its Finnish OS to Gods Own Language** it is almost ready for its free installation of Windows-10. Unfortunately, it runs Vista (painful!), so I'm out scouring more rubbish skips for a Windows-7 or -8 licence sticker before July 28...
* I find quite a few good laptops, usually with stupid faults like a key stuck down by coffee (I hope!) loose memory card, HD trashed, or the DVD won't eject - most less than a couple of years old.
** R.F.Delderfield: God Is An Englishman. Essential read. As are all his books.