In addition to Stop Loss, the other major movie coming out this weekend is 21.

21 is the based on the true story of six M.I.T. students who took Las Vegas for millions in Blackjack using card counting techniques they learned with their math professor.

What did the critics think of this crime caper starring Jim Sturgess, Kate Bosworth, Kevin Spacey, and Laurence Fishburne?

Inspired by the real-life story of the M.I.T. students who took Las Vegas casinos for millions, 21 has been reshaped to fit a simple movie template -- and it's nearly as much fun as watching an insurance professional compute actuarial tables. -- Chicago Sun-Times

The fascinating story of six college students who took Las Vegas for millions gets dealt a bad hand in 21, which turns their true-life saga into a slick, shallow and thoroughly generic caper flick. -- New York Post

This is really Spacey's picture, from the moment he fixes his gaze on Sturgess to the day when he finally, brutally cuts him loose. It's a fun performance, but a quiet one. -- Newark Star-Ledger

When Spacey and Fishburne really go at each other, 21 finally starts to add up to something. -- Toronto Star