I downloaded my copy in the early hours of the morning [Sat in Aus]. I have yet to install it, but I reckon it will go smoothly if the purchase and download process is anything to go by. I'll get round to installing it once I've sated myself with my first forum foray of the day, however.
I'm going to install it on my main rig as that has the higher specs and the 2 SSD's in RAID0, which will boost its performance considerably over the platter drive it was on. I had been running Win 8 Customer Preview in a dual boot configuration with Win 7 as the primary OS, but to get the best performance from my CPU and the OS, I need to be running Win 8 on the SSD's. This time around, however, I will not be dual booting. I will be installing Win 7 on my second rig upstairs, while my Win 8 rig remains downstairs.
Like you, Tom, I was not at all impressed with Win 8 when the first previews were released, but I gave serious thought to some relevant points and persevered with it.... and with the latest edition of Stardock's Start8 installed, it's not a lot different to using Win 7. Yes, the Metro interface put me off as well, but with Start8 installed you never have to deal with it, booting directly into the desktop, which as I said, is just like running Win 7.
The points to consider are: Microsoft is very unlikely to return to previous incarnations of Windows now that it has taken this step to merge the various platforms it uses, meaning that in a few short years you'll not be able to purchase XP, Vista or Win 7 pre-installed or on an installation disc.; Microsoft will pull support for XP and Vista sooner rather than later, and for Win 7 around the time Win 11 is released. What this adds up to is that we're going to have to adapt to the new way of doing things or get left behind, and it's probably best to begin that transition with Win 8 as things will have changed considerably more when Win 11 is released and the older incarnations are dropped/no longer supported.
Well that's the way I see it, and while I'm not a fan of Metro, I will familiarise myself with it to avoid getting left behind further down the track.