Jefferson Prep is by far the worst customer service I've ever received. Its a scam. They have nice people picking up the phone and luring you into signing up, but the tutors are simply "study-buddies". They are not familiar with the updated versions of the exam and try to teach you things that are outdated. On top of that, their "corporate office", if you can call the three guys that work in their office that answer the phones, are complete jerks. When they want your money, they are great. As soon as they get the money, and you need some sort of assistance, they refuse to speak with you, and ask you to email them all the complaints.
I have contacted Better Business Bureau to suspend the scam.
Would highly suggest never using Jefferson Prep / JeffersonPrep company.