Quality of On demand course,time to go over all the material

Hi!
I took the course from mid Jan to end March and it boosted me from 590 to 710 (especially improved in the Q section). So I try to answer the questions you've posed based on my experience with Knewton:
1.) How it is different from full course access program (other than just 4 months access compared to 1 year in full program) & does the +50 score valid here as well. Will there be any help on doubts if one has ?
--> When I took the course, they didn't have a differentiation. But other from the live vs. on-demand classes and the length of access I don't see a difference. The +50pts guarantee should be valid for both types.
2: I would be able to manage approx 1 hr on weekdays (Monday to Friday) and may 3-4 hours on Sat, Sunday, so given this how much time should be sufficient (this will help me to plan my work accordingly!)
--> There are in total 13 classes (one intro class and then 12 classes). Each class is divided into Q and V. Prepare for spending around 3-4hours watching the videos (sometimes you want to listen to a specific topic again, etc.). The homework took me around an hour - but you can definitely spend more time on that if you want to. The tests of course are timed as the real GMAT. Depending on how quick you want to get finished with Knewton, your time schedule would allow for finishing everything within 13/14 weeks.
3: Even though I would want that I 'll exceed +50 (i.e. 730) score from my current 680 but just want to know what all things at minimum I must have to complete in order to be eligible for the claiming back my money. What I understand is one must complete 6 cats (I believe it's more or less in sink with original test) + home works (any idea on how it's arranged and volume of Q's ?). Am I missing anything here ?
--> I asked Knewton the exact same question. You have to take all CATs (in a considerable amount of time, so if you just clicked through the CATs to have it "finished" that won't count. You have to listen to all classes and you have to complete all "core homework exercises" (there are some additional ones, which I always did, too). Knewton also shows a green/yellow/red light on your time schedule whether you still have work pending or whether you have completed all necessary work for that session.
I hope I could help a bit.
Cheers!