I've been happy with Gleim. It got me through both FAR and AUD. As mentioned, the MCQ are great preparation, with phrasing very similar to what you'll see on the exam. The SIMs are almost identical to the exam presentation – meaning hard, vague and everything else we expect SIMS to be. Answer explanations are, for the most part, helpful. The book is detailed, which helps for some of the more complex calculations/concepts. Also, the customer service is great. The personal counselor is highly responsive.
I haven't been impressed with the lectures – they're basically an instructor reciting the book outline. The accounting expert feature isn't very helpful in my opinion, either. They won't address other elements of a question. Not deal breakers for me, though, as the other materials are great.
Keeping my fingers crossed it prepares me well for REG in Q2 2017. Good luck on FAR.
FAR: 80 (10/28/2016)
AUD: 85 (2/6/2017)
REG: DSIT (Dragon Slayer in Training) (5/2017)
BEC: DSIW (Dragon Slayer in Waiting) (7/2017)