As a follow-up, I employed the heating feature this weekend and it worked perfectly. I first used it to maintain ferm temps overnight as the temp was getting to the low 60s in my garage and fermentation was slowing (and thus cooling off). I also used to it warm back up to about 70F after a soft crash that went to about 55F.
With maintaining temps, I never saw more than a 0.4 C degree overshoot, so I did not have any conflict with the cooling and thus there was no yo-yo type effect that I had read about. After the soft crash, I set the temp to 70F (21.1C) before I went to bed and woke up to 21.1C. So, I am quite pleased with how this is working on all fronts! Note that this batch was a half batch: 6 gallons in a CF10 (neoprene jacket and the spike heat pad).
And
@blazin, this will definitely work for lagering 12 gallons. I've gotten 12 gallons down to 34F no problem for a cold crash with the Max set at 28F. Obviously, the unit runs more at this temp, but it certainly wasn't continuous.