The site was extremely helpful in identifying the key subject/study areas where I needed improvement on the GMAT and distilling the thinking skills and test-taking tools I needed to really improve my score. This site is especially helpful for folks who are severely out of practice in subject areas where they once excelled (e.g. math) and for those who struggle with maneuvering effectively through the unique of the GMAT. I wish there were some readily accessible way to incorporate real GMAT results into the system, but it's still an excellent tool as is. I highly recommend it.