Need your opinion - analysis of 800 score tests

Hi guys

I did 4 tests from 800 score and thought I was doing pretty good. But then I accualy looked up my total score on the web ( the ones who did this know what I am taking about) my score was ranging between 510 and 540. I am kind of dissappointed.
The reason I thought I am doing well is because my math was always hovering around 75% and verbal section around 50% (I am not stupid just not a native speaker:)) which altogether not a bad result. But for some reason seems to me that my verbal drives down my total score. So I think that the test assigns more score to each verbal that you got right than to each math. Otherwise I don't know how to explain my scores:((

What do you think? Also I heard that the 800 is harder that the acual test. How many points should I add to my 800 score test results to get approximation for a real test?

BTW, I think the tests are really great and recomment it to the ones who haven't taken gmat yet.

Thanks
Ulviya
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Proud to be Azeri

Ulviya, I used the 800score too. Here is my humble opinion: 800 score marks each section up to 60, but the actual GMAT does so up to 51. Therefore, scores on 800score and on the actual test are not comparable. The actual test gives 800 if you have 51/51 - which is perfect. So, the software scores are somewhat exaggerated. Nevertheless, the software is helpful. I took all 5 tests and got 720+ on each. The best score was 770. Yet, the actual score is 660.

I have heard many times that Powerprep and Kaplan underscore people, robbing up to 100 points.