There is no shortage of options when you’re deciding which course to use to prepare for the GMAT. Maybe you’re new to GMAT prep. Maybe you’ve even been burned by an expensive GMAT course before and don’t want to make the same mistake again. Here’s a quick comparison of some of the most popular online GMAT preparation offerings, showing how Knewton stacks up to Kaplan, Princeton Review, Manhattan GMAT Online, and Veritas Prep. What’s the best GMAT prep course for you?