Quick review... I played this game less than an hour, so I don't have much to say about it. Shooting around is fun, but the most important attribute of car-theft-style games is the cars. There much of a variety and they all pretty much handle the same. The storyline didn't make me want to keep playing.
Instead of getting right into the action, the game requires you to do "activities" after the game's first real mission. Mini-games aren't required to advance in GTA4, which is how I prefer it!
Instead of complaining anymore, I'd just say that if you still enjoy the multiplayer experience of GTA4, stick with that. I hadn't played in about a month, but after playing SR2 for an hour, I'm re-hooked on GTA.
This is a ghetto version of GTA 4. The game already froze up on me 2 times on the first day. Having to complete menial "activities" like running over people in a flaming ATV before you can play missions is just plain silly. It's the developers' way of ensuring we play more of the game than we want or need to play.
If you're rating this game solely on its own without ever playing GTA, then it would be a 6, maybe. Now, after playing the most recent GTA only makes you realize just how much better it was or how much worse Saints Row is. However, I did play it slightly longer then Army of Two (Less then 30 minutes) but you will not get through much of it if you've played and enjoyed GTA.