I've installed it and generally very happy with it.
The much-vaunted handoff is not very reliable so far and only works sporadically. I daresay that will be sorted out soon. But when it works, it is excellent - really cool to be able to answer a call from computer if you've left the mobile downstairs, or reply to texts direct from computer instead of messing around on iphone keyboard. The new iCloud drive is a big improvement too.
I guess the reason that there has not been much reaction in the press is that generally it is very good.