Just started playing this with Bob, and I gotta say, it's crazy fun! I don't think it'd be that great solo — there are a lot of rough edges and weird quirks to the game that would probably stick out more if you played on your own — but with a friend, it winds up being all about the over-the-top action, cheesy 80s-action-movie cliches and hilariously bad dialogue.
For example: at one point you destroy a tank by picking up huge shells from a crate, THROWING them at the tank and then shooting them to blow them up!
Oh, and also the tag-team healing, because the more people who heal a guy who's down at once, the faster he gets back to his feet.
Even though it's obviously a shooter through and through, each character definitely plays differently. I found myself gravitating towards Caesar, the automatic shotgun- and RPG-wielding Terry Crews character, and Bob preferred Dolph Lundgren's sniper rifle- and shorty-shotgun-armed Gunner. Yang, the guy with the throwing knives and the smoke grenades, is pretty cool, too. We both really felt Arnold Schwarzenneger should've been in there, though. That would've made the game complete.
Anyway, although I bet it winds up being the weakest of the PSN Play games in a game reviewer sense, it's also sure to be the cheesiest — in a good way. If you like shooting hordes of enemies with a friend and wading into ambush after ambush together, I bet you'll have a good time with it. So is anyone else getting it? Maybe we can get a full team going at some point!