Some fast notions from the top of my head:

The phone is fast, responsive and intuitive coming from N9. I´ve gotten it to freeze when I took a photo (I heard this is a known bug, but hard to reproduce =) and a few times the pulley menus have frozen as well.
Map app works well and seems to be quite fast. No option for offline navigation, didn´t work when I turned wlan and internet off. Has turn-by-turn navigation, you can choose car or by foot.
You can´t change the options in the lock screen´s pulley meny (not yeat, at least).
Whatsapp and Spotify work well.
I have received only one call from Whatsappa registration, sound quality seemed ok.
Universal copy-paste seemed to work, at least between native Notes and Quicklist and Android FB.
Plays FLAC (yay!), sound quality is good. Occasional creaks from pulley menus can be heard when I have my ear phones.
The feed doesn´t seem to work, or I just don´t know how yet. When I pull from down, it brings out the notifications etc but doesn´t show the FB/etc feed like in demos. Have to look more into this later.
The limited TOH contains an ambience (orange stripes, called The First One) and ring tones (haven´t looked into those yet).
The browser seems to be fast, although the scrolling could be a bit faster. No landscape mode yet, as is known. The options bar appears at the bottom of the screen when you scroll up a bit and you have to choose the tab bar to type in the url.

And oh, I almost forgot: I got Marc to sign my TOH (on the inside of course, so it won´t wear off). Apparently I was the first one, again, to get one signed by him (he had only signed one n900 previously). =D