Hey man,
I actually too the Man GMAT course at the beginning of the year. Due to work, I actually went AWOL on my study for close to six months and them study on and off for less than 2 months. I took the test and had an off day but still got 640.
With this background, I would recommend Man GMAT. The materials are very well organized. The only issue is that Man GMAT stuffs are not tough enough for 700-level questions. you will need to do you own research. Another issue is that half an hour of each class is devoted to in-class practice (I can do that at home).
Pat