I've read pages of posts on this so I'm just throwing my $.02 in here. 2009 Roadie, HK 2.75 Big Straights, L.A. Choppers BAK
, Power Commander V. Pulls like a freight train no stutters, no hiccups, no surging. Almost 1K since I put it on and no issues. I do not have the O2 sensors hooked up. It may have something to do with the fact that PC has a map
for pretty much my exact setup or it may be something with the V over the III but mine runs without any of the seemingly common PC issues. But to each their own, I know some members don't run one and have no issues it's just my personal choice to run one.