Actual GMAT 740 (Q48,V44)
Peterson: 760, 660 Did not like this one...a couple questions showed up with the answers
crack: 680, 685, 650, 685 My favorite one, learned the most...best official GMAT predictor...just add about 60 points
Powerprep: 720, 730 Just like the official test
Kaplan: 620, 610, 590, 640 My second favorite
800score: 700, 720, 790, 690