I've been playing it a lot over the Easter long weekend and beyond, still trying to collect everything.
If you're going to get into Fez, I suggest getting into it as quickly as possible., because the game is very much like Braid and Limbo in terms of trying to collect everything. Remember the 7 Stars shenanigans in Braid, or the Easter Eggs in Limbo? It's a bit like that, except it's half the game instead.
So you'll probably want to join in on the people going crazy trying to figure this shit out, because it requires you to think extremely outside the box sometimes.
I have had the same issues mentioned in reviews though -- I've had at least 3 crashes in the game while it's been loading, found ways outside the collision on some of the small rooms, and found a repeatable way to crash the game in one of the menus. It kind of sucks that it happens, but the game itself is quite good.
wow. none of that sounds appealing at all...
demo better charm me pretty quick i guess.