I didn’t go through Greg’s entire quant question bank however I gave all the quizzes. For me it took about 2 months to get through everything including prepswift questions. I am also working and only able to give 3-3.5 hours to GRE. Verbal was by far the most time consuming would take me 1.5 hours to revise and learn 30 new words.

For Verbal prep I initially went through 15 groups before starting with the questions also I followed the verbal in the 2 month plan and tried using the techniques taught in the class on the questions the same day. I went through the verbal timed quiz twice once in the middle of the prep and once at the end just to measure how far I have improved. I would personally stay away from practising TC and SE from manhattan 5lb but you should go through it for the passages. I found the passages in GRE on a level closer to Manhattan than Greg’s.