User blog comment:Drkdragonz66/Modern Warfare 3 reveal trailer released/@comment-169.199.224.104-20110524175016/@comment-169.199.224.104-20110524180408

1. You get to learn maps. 2. Find glitches so they can fix them before actual retail sell. 3. Fix OP'd guns, or ballance guns. 4. Test servers and see how it can handle (since alot of games so far are having server troubles when released. 5.Would be intresting to have just to test and see if you like the game or not.