I've used RCBS products for the past 33 years, very pleased with their product. However, the only problem I did have was with the set-screw to lock the ring. All I did was replace the ring with a Forester ring, case in point, I have extras on had incase required. I find that the Redding Dies are a better made quality, however the RCBS dies still work.So I had a few set screws strip on some of my RCBS dies.
I sent them a message about it at 1:00 in the morning, by 8:00am new ones were on the way. I mentioned i'd lost the nut on my bullet seater so they're sending one of those too.
Great company.
One time I had a bad expander ball on my 30-30 die. They sent me the whole rod assembly as well as half a dozen decap pins.
... all free of charge.
They've earned my business.