Watched it (spoilers)

It was better than Escape Plan 2, but wasn't that big of a fan of it.

*The good
-Stallone has a bigger role
-Max Zhang was a good addition to the team, like his fights, he was better then Huang Xiaoming from EP2 in my opinion, Harry Shum was good as well
-Liked Bautista's fight scene with that big dude towards the end
-I liked the way they made more call backs to the first one
-The end credits sequence was cool
Liked the fight between Stallone and Devon Sawa (Lester Jr)
-Was entertained by it

*Bad
-We don't see much of 50 Cent, he only in the beginning and you don't see him again, not even at the end, I was expecting Breslin or Jules to give him a call
-The plot was kinda thin
-Dave Bautista wasn't in it that much
-I was disappointed that Jesse Metcalfe didn't come back, I didn't mind him in part 2, but I guess they couldn't fit him into the story
-Some of the editing was a bit choppy
-They didn't really delve deeper into the Ray Breslin (Stallone) character