Just passed the 1k rds mark on my regulator. It long ago worked into a fairly smooth cycling shotgun comparable to the new 870s. Zero issues with target loads, 00 buck or slugs.
I havent done anything to it, still in factory configuration Aftermarket 870 parts do not fit the regulator, however there is a gun smith, name escapes me, out of the belleville area that makes adapter plates that will let standard 870 stocks and such mount on the canuck receiver. Havent gotten around to changing anything on it, but its mostly for screwing around on the range and breaching doors so not really sure I need to.
For 300 bucks it is a good buy.
The leather scabbard it came with was underwhelming and would need some serious rework to turn into something useful.