Folks,
I want to practice with real hard questions as im aiming for a real high score. Which is the best book for this ? I'm contemplating on purchasing Kaplan 800. If this a good investment ? Can anyone who has used this book comment on this ?
Thanks.

I am normally very critical of Kaplan's products. However the Kaplan 800 is actually one of the most useful books for GMAT. I would highly recommend it.

It is good choice for Verbal section but I will not vouch for its Quant section. I was able to cover entire math section with 95% (excluding DS and word problems) accuracy with in 50 minutes. I think math section is very easy and actual GMAT questions are tough as compared to that.
The question you have here in GMAT club test are real good questions (Both for Qunat and Verbal), if you are able to solve these without any help then you can ace in GMAT.

I will say Manhattan is pretty good as well.

Uhh, I don't want to sound negative but I have to post this reply.

For a Christ's sake don't waste your money and time on this bunch of worthless papers! I can't decide which part is worse, Quant or Verbal. Although both are poorly written and even worse explained I firmly believe that, if you are working on your verbal skills using this garbage, your score is likely to go down. Kaplans readings, arguments and sentences are so poorly written and so far from real test questions that you are probably going to adopt some creepy logic of Kaplans instructors, which ultimately leeds to drop in your verbal score.

Math section is not so "dangerous" as verbal but still is one of the poorest crapy things I've ever seen. There is no any kind of methodology or some structured approach, instead they will give you a bunch of questions that were considered hard probably in the 1970's but now are a joke when compared to the real deal. But even that is not the end of the trouble. Quant questions are so poorly explained that I was sick when I first read one of explanations. Plain language, without any kind of try to establish some methodical or scientific approach. "Why A is bigger than B? Because it is, maaaan! You see, Earth is bigger than Moon, Sun is bigger than Earth... A is bigger than B! See? Right? OK, let's go further...".

Math section has no any kind of structure or organization, there are just examples clustered in some groups of 4 based on similarity of an issue. Questions are hard but that is just the entry level of hard q's seen on the real deal. For example, motion problems... They presented only one problem of two objects moving toward each other. Simple, basic problem with two planes fluying in the opposite directions at a constant speed. How long will take them to pass each other? Yeah, right, though one isn't it? That' the point of start for some serious test prep programs, but a peak of career for the Merry Andrew who write funny questions for Kaplan.

Although I agree with Gmatblackbelt who wrote that Kaplan was the only test prep program that even mentioned something about elipsis in the SC part of the Kaplan800, I don't think that one passage (also poorly written) is good enough reason to spend 27 bucks on this book. If you are a serious test taker stick to the serious programs, if you are a beginner then lurk throughout this forum and find some stuff to start with (I guess Princeton Review or something like that).
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I quite agree.
I bought it especially for the math section, hoping to find tougher questions than those in the OG (which is far to easy to score 50+ in Quant) and I was really disappointed :/

The DS section isn't bad, some questions are more challenging than OG's, but PS is really easy.

I've haven't tried the Verbal section yet, I'll work on it after finishing the Manhattan SC Prep Guide.


Nb: My Kaplan 800 is the 2008/2009 version.

I bought it. But the problems are not very tough. The book mostly emphasizes on strategies. I did not find it very helpful.

working through it right now. questions seem really easy. not sure if this is because MGMAT makes their questions too hard, or if Kaplan 800 makes theirs too easy.
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I did it all for the Starwood points.

Kaplan is only good for their CAT Exams...

Also there is about 80 to 100 point curve on its score.

For example, if you get 500 on Kaplan CAT exam, it's really 600 (equivalent) on MGMAT CAT, or real GMAT. They make it harder than real GMAT.
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I've heard some good things about it simply because it throws stuff at you that you've never seen before