I'll qualify the statement with the disclaimer that I have no personal experience with the brand, though I was planning on ordering a pump, receiver drier, and expansion valve shortly, assuming that I can't find a shop that I trust to do a shaft seal replacement on my SD's R4 pump.
I'm also debating the virtues of converting back to R12 while I'm in there, but not sure I want to go to the effort of that thorough a flush, as well as expending that much of my limited r12 stock, not to mention trying to get the idiotic fittings off.

I got the info leading me to read up on Four Seasons from my father who is a fleet mechanic for one of the Oregon state fleets, and he's generally not led me wrong on auto maintenance topics.

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-Josh
Testing the cheap Mercedes axiom, one bolt at a time...