I have a 66, which is a combination of the 63 and the 65. The test for the 66 was quite a challenge - basically a bunch of overly wordy legalese written by lawyers with the intent of tripping you up on any one little word or nuance.
Yes, I made an 80. The firm I was working for at the time paid for the training for the 66, Series 7, (and eventually the CFP), as well as a life/health insurance license that I had already earned at a bank prior to going to the brokerage firm. I found the training to be very helpful, and taking the practice tests over and over to be particularly helpful for the 66. http://www.firesolutions.com/
