I am writing this post with reference to multiple queries that people have regarding which GMAT test series to do. This is based on my own analysis and also some of my freinds who have successfully taken up GMAT and got 700 +
GMAT prep: The best test series one can get hold of , but there is a word of caution with this one, dont do it till you are all prepared with OG.
Once you start doing GMAT prep, chances are you may start remembering the questions and it may not be as effective as it should be.
P.S: Everyone should practice using wiley's log in and writing sectionals.
Expert Global tests: They are the nearest one to GMAT prep, i found quant to be the nearest to GMAT and they have this cool offer of giving 15 tests
Veritas: The verbal section will get you demotivated but you can always work and learn more nature of tough questions. The quant is bit easier
Manhattan: They have an awesome analytical tool,but the questions can digress from GMAT level. One should touch it only if prepared with OG and Wiley nicely
Hope this post helps