SAT Prep: Georgetown Learning Center (GLC) or The Princeton Review -- which is better??

If choosing between Georgetown Learning Center (GLC) or The Princeton Review – which is better??

GLC offers 5 classes of 4 hrs each – 20 hrs total; plus 10 hrs of study lounge; plus 2 practice tests…hefty price tag of $749
The Princeton Review offers 6 classes of 3 hrs each – 18 hrs total; plus 3 practice tests…price tag of $599.

I’m leaning toward The Princeton Review mainly because they offer 3 practice tests and their classes are 3 hrs…I think 4 hrs of class time is bit long.

Has anyone done The Princeton Review SAT Prep??