I do HCT 12 (google HCT 12 PDF for details), it's similar to this. Very basic, but it does incorpirate a cluster set at the end of each heavy set (ramped up in weight)
Why did you decide to do a 3 day routine (ABA) rather than a 4 day routine AB, rest, AB? I would do a 4 day routine rather, and do a deload after 6-8 weeks.. Or if you find 4 days too much, then do ABA, BAB, ABAB - then switch back (so 2 weeks of 3 days training per week, then 2 weeks of 4 days per week)
Good luck - as long as you progress you cant go wrong!