Good deal. I've noticed you saying more frequently that you feel tired. It could be the program, but it could also be sleep, diet, stress issues. If you want to milk it for all it's got, make sure everything else is in order. I attribute part of my success on my 5x5 gain with 8-9 hours of sleep every night, and of course TONS of food. The combo really kicks the recovery mechanisms into overdrive.
Good luck, and keep us posted. Great job so far!