FWIW, the only Cessna single I ever flew with AC was P210R service testing. On a 100 deg day, it was better than nothing but left a lot to be desired.

FWIW - factory A/C also takes out a pretty good amount of headroom as the vents / ducts are mounted overhead. With the adjustable seats should not be a factor for most pilots but knocks them out for me - 6'5", tall trunk measure.