Just got back from the testing center and created an account to contribute to this thread (it helped keep me sane in the last 2.5 weeks of studying). To preface, I primarily needed a good Verbal, so I didn't really take the Quantitative sections very seriously. Also I agree with above posters on the difference between Manhattan/Magoosh and the real exam's Verbal sections -- Manhattan tends to sprinkle a lot of esoteric vocab on its practice exams and there are some fine logical discrepancies between Manhattan/Magoosh and the actual test. It's hard to quantify but it was much harder for me to determine why one answer choice was better than the other in Manhattan/Magoosh than it was on the real test. To be fair, though, I got that perception pretty early on so it might have been partially self-fulfilling.
Anyway, for future test takers: don't be too alarmed if your Verbal scores are somewhat low on Manhattan/Magoosh tests! Trust the ETS tests, as everyone else has said. At the same time, it never hurts to prepare with something more difficult but I suggest moving to ETS before your actual exam so you can get a feel for the amount of inference you might need.
Manhattan Average (out of 6): 163 V
Magoosh (only took two tests, exclusively verbal): 163 V, 164 V
ETS Book #1 and #2: 166 V
PowerPrep #1: 164 V 163 Q
PowerPrep #2: 168 V 157 Q
Real Test (Unofficial scores -- they better not change!): 167 V 160Q