I guess there is some worth to doing one MBE studying and then doing PMBR and seeing if your score improves. However, Bar/Bri charges 2 grand a person for books whose material barely changes from year to year. You might try to buy or borrow materials from a law graduate. I would recommend the Home Study Bar/Bri program (if you can afford it). You can create your own schedule and listen to the lectures on the I-Pod they send you. You do have to be disciplined and sit down and listen to the I-pod and fill in the blanks But you could do those 3 hours anytime of day that you like. For instance, if you like to work out in the morning, you can listen to the lectures in the afternoon or vice versa. You just have a lot more flexibility. Maybe a couple of students can do the home study together, although this may violate Bar/Bri's policy
It also helps to do lots of practice questions. I highly recommend the Study Smart Software, because you can track your progress and target your questions to the areas that you are weak. If you struggle with Negligence in Torts and Governmental Immunities in Con Law, you can pick and choose only questions in those topics until you improve.
I would also highly recommend Strategies & Tactics for the MBE