Has anyone replaced R12 with freeze 12? If so how does it cool?

Correctly converting to R134a is the correct procedure.

Freeze 12 is NOT a drop in either. There are various Fill fittings for the various refrigerants. Its federal law.

Freeze 12 is a legal replacement for r12 and is compatible with r12 oil.

i used it all the time in my 92 chevy pickup. it worked great and you can buy it on line without a license.