Aftermarket vs Factory A/C Comparisons

[29od1]

I would like to pose the question whether the aftermarket A/C kits (Vintage Air, Old Air, etc) perform well enough to cool the entire cab of a Blazer/Jimmy?

And also if anyone has a comparison of the factory A/C systems compared to aftermarket A/C.

I know this has been asked in the past, but I've not found a real concensus on an answer.

I think this topic would greatly interest many people, so please let's hear from RUNNING and DRIVING Blazer and Jimmy owners that have actual first hand experience.

Thanks!