We're all entitled to opinions, so here's my take-- To flush or not, actually has alot to do with what the shop's 'flush' is --- if it's a high power forced fluid flush, that is indeed bad, for sure. now, if the flush is done with proper equipment (that acts like a kidney dialysis machine) that uses the tran's own pump (hooked into a cooler line), then that is the safe way to go. perhaps it's my flawed logic, but if flushing using this method clogs anything, it would have already been clogged just by normal operation. If i dont have access to this machine, then drop pan, change filter, and refill.... but you'll have to do it again soon.