I did ABBH earlier this year and LOVED it. Don't underestimate only doing two/three exercises, because you'll be feeling it. . . .especially after the 5x10 days if you use proper loading. I'm finishing up BBB on Tuesday and will be starting up ABBH for the second time the following Monday, and I can't wait.
Also Chad advocates using upper/lower splits to get used to a higher training frequency (if you haven't already been doing this) and he gradually will increase volume and/or frequency in progressing through his programs. Not sure what template you're following but BBB/ABBH are the only upper/lower splits in there.
Do you have a training log here? If not you should start one. . . mine is titled This is my Muscle Revolution.
Good Luck!
-Matt
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