I completed it as well in 19 hours with a rank of eagle, I killed way over 250 people but maybe next playthrough I'll be better. As far as story wise MGS4 was perfect.... absolutely perfect. It tied everything together so well and left me guessing till the very end. Gameplay wise it was refreshing to play something other than a cut and paste first person shooter (man they have been really popular lately). The weapon customization is kinda cool but honestly it wasnt as addictive as I've been hearing, just buy a scope and pop it on your gun.... big deal . Also the Psych meter is annoyingly annoying, its really kinda useless. That said though MGS4 gameplay is amazing, and also has 2 of the best MGS boss fights ever (both of which come in the latter half of the game) to make sure you go back and play again! Finally Kojima made a game that surpassed MGS ..... MGS4!