Best Material to study from …lvl 1

CFAI material is the best, handdown. The only drawback of CFAI material is that those books are so bloody thick, that’s not even funny. :s

3rd party material is slightly thinner (emphasize on slightly), but you’re basically gambling on what part of curriculum they’ll leave behind in each and every year. Last year Elan completely nailed it, while Schweser seemed to ignore some important parts… although I’m pretty sure it could be the other way around in different time. 😛

I used Schweser for L1 & 2. I don’t have experience with any other providers because it worked for me.

Thank you so much BryanMosley ! This has helped me a lot with my weaknesses. 

I used schweser for Level 1. In addition to this, I also used an online practicing tool -Prepsmarter.com -for practicing questions based on each and every topic. You must have been facing the problem of forgetting what you have learnt . This will help you a lot.
Best of luck