I'm really busy this week so won't have much time to play until the weekend, but I did manage to get it installed and played it for about an hour and a half last night.
I can't describe how happy I am that Rockstar found their way back to the real GTA-experience. After being hugely disappointed by IV, I was so worried that would be the path GTA would go from there - especially since reviewers for some reason were having some weird "who can praise IV most"-competition between themselves.
Only thing that would make this better is if it was on the pc, but waiting for that is a lot easier now
The iFruit-app is pretty terrible though. Mostly it won't let me log in (cycling between claiming my accounts can't be synced, that I have no network and at least two other random errors) and when I do get in, it will only work randomly, suddenly freezing telling me there's no network.
I also can't figure out how to train the dog, but if I got to try for more than a few seconds at the time, that'd probably work...