You get out what you put into it...

Kaplan GRE instructors were great. Online classes were very convenient since I am always traveling - the best part is they were surprisingly engaging. The personal tutor really helps you understand the product and material and tells you what to focus on based on your scores. Having the personal tutor really holds you accountable (something that is usually missing when you're not physically in a classroom.) If you are engaged in your classes, do all the homework, and listen to your tutor you WILL improve your score tremendously. It's worth every penny if you're willing to put in the effort.