I got Saints Row 2 last week. I've spent about 30 hours on it so far and I'm loving it!
I was expecting a kinda crappy version of GTA and in some ways it is but it's also really, really good. It steals loads of stuff from the whole GTA series. It's like an 'unofficial' GTA game.
The graphics aren't nearly as good as GTA4 but they are still pretty good and it easily makes up for it with the amount of stuff to do and the incredible amount of customization. I've spent so many hours just messing around with it and customizing everything. It's awesome!!!
I havn't tried the first of the DLC yet but I'm glad PS3 users are getting it (unlike Rockstar who sold us PS3 users out

)