There's the obvious,
"This game is only 15-20 bucks right now man! And it's on indefinate free trial! WHY NOT??"
But what else would you say to someone to try and get them to check the game out?
"They're really making good progress and its fun to see where the game is going."
or
"DUDE you can TOTALLY play as a hot catgirl in nothing but a bikini ALL DAY ERRY DAY"
or even
"THERE'S PRETTY GRAPHICS AND VOICE ACTING AND CUTE SQUIRRELS EVERYWHERRRE"
Would you mix it with caution?
"Yeah I'd try it out, but be prepared for a really ack-basswords registration process"
"DO NOT PLAY WITH A KEYBOARD OMG. GET A CONTROLLER"
"It's like Final Fantasy XI without all the distracting stuff like actual content."
Or would you even bother?
"Yeah I'm just playing it to see where it's going, but I wouldn't recommend it to anyone."
"It's terrible. I'm only in it for the hot virtual bikini babes."
"Just wait for PS3 release."
"LOL STILL 4.0"
So what do you say?