I really wanted to like it and bought into their promo deal to put it onto my laptop (like $40 for a legit copy of Win 8 Upgrade).
But I've run into the same gripes as him regarding the interface. If you were just in the Modern UI 100% of the time on the tablet it wouldn't be a terrible experience. However, it tries to switch back and forth from that interface to the traditional desktop interface and does so very, very poorly. Even on a tablet this transition is godawful. It's worse on a non-touchscreen laptop.
The new "start menu" just adds more work for me and adds very little value to the experience. This isn't a bad format for a tablet, but when you're on a laptop and not in the Modern UI - forcing the use of that new start menu is just absurd.
Now, it does seem to be a bit more responsive than Windows 7 and has a couple of neat features - for example the taskbar now extends across multiple screens and you can set its behavior to a couple of different methods. It seems to integrate nicely w/ the xbox environment but I'm waiting to see what its full potential will be for that.
Overall there are just a lot of things like "are you friggin serious?". In the land of UI the amount of mouse movement, clicks, and typing is how we define "work" and yet for some reason MS has been wanting to add more work to a lot of the user's tasks. This is something I still don't quite understand. (Look at the office ribbon - despite some of its nice features there are quite a few places where it just managed to add more work for the user to accomplish a task).
So yeah, it's that bad. I don't outright hate it but it's because I've modified a lot of it so far to fit what I'm after. I would absolutely recommend against it for a non geek to upgrade to.