We've heard relatively good things from students about Kaplan 800, though we would tend to agree with Founder that they are not quite in the 800 range.
Our students typically tell us that our math problems are among the hardest they've seen.
Our Turbocharge Your GMAT course materials are about 600 pages of well-illustrated and professionally presented strategies and exclusive problems for both the Verbal Section and the Quantitative Section. There are 200 pages of detailed solutions and 300 pages of internally developed Quantitative and Verbal vocabulary lists with detailed definitions, related words and sentence examples.
If you would be interested in getting our material at a discount, you can call the number below and mention this GMAT Club forum post. Hope this helps!
Manhattan Review US
US: +1-212-997-1660
UK: +44-20 3318 3131
Study with Friends - US$200 Shared Rewards!