I took the on-sight, and honestly the teacher was not the most energetic or suitable for this course, but thank god one time I missed a class, and I had to make it up with an online class. And it was GREAT.
The online teacher was soooo enthusiastic and encouraging. It was so convenient. I didn't have to go anywhere for the class!! And if the teacher is going off about something that I understood already, I could do something else, like grab a quick snack or get a drink of water.

So... after the on-sight, my score went from about 400-500 to 660. However, I wasn't very pleased with the result because I got a 690 in one of the practice tests, so I've reregistered at Kaplan. I'm taking an online advanced course right now, and the most amazing thing is the teacher is, again, very enthusiastic, full of energy and very encouraging.

Best of all, at Kaplan, you can retake the course as many times as you would like, or even switch from advantage to advance like me, for free. You only have to pay once. They don't even charge you for the shipping fee of the new books!!! (If the newer course costs more, you might have to pay the difference, though)

A plus is their customer service is amazing. They answer my emails (yes they even take care of their emails very efficiently) very quickly.

I hope this help in your choice of tutoring service.

Best of luck,

Test taker