Tried several review courses before I found the BEST

I was determined to study for the GMAT on my own time rather then pay for an in person course (which can get extremely expensive). I tried Kaplan and Magoosh first before finding Target Test Prep. Target Test Prep was the easiest to navigate by far, it really let me customize my study plan to my needs. With some of the other courses I had to sit and listen to 15 min. of video of topics I already knew; but with Target you can choose whether to read text or listen to audio/video, which I would then take advantage of if I needed further explanation. I used Target Test Prep for 2 months of Quant studying under their flexible plan, it really helped motivate me to actually sit down and study after work (since I was paying month by month). I ended up with a 690 on the GMAT.