Power Commander or Not?

Hi pepes, I am new to this forum, so HI. I just purchased a new SXS maverick xmr 1000 :th_smiliedance:. It came loaded up with accessories, including dual muzzy exhaust and a power commander 5, no air intake mods. It ran like crap so I brought it back to dealer and they removed the Power commander, now it runs good. Anyone out there experienced with this combo of accessories? I have read that some guys with the power commander in the 1000 outlander were of different opinions weather it was needed with the muzzy duals, no air intake mods.