Just my 2, but I won't install re-mans in my car or a customer’s car for that matter.
Look at the cost of the reman, and then keep in mind these calipers are being shipped offshore for the work. Add up the cost for transport, tearing down and re-building the caliper etc and there isn't much $ insuring that they do a first rate job. Personally, I don't trust my safety to some off shore 25 cents an hour workforce.
Even if calipers are frozen I’ve found that holding the non-frozen side w/ a c clamp and using the cars hydraulics to do the work gets them apart. If it's being particularly stubborn turn the car on. Just be Careful..Those pistons will fly out w/ some wicked force.
Just did a set today as a matter of fact
Jonathan