I've owned an Olympic Arms AR-15 since 2000 or 2001. Hasn't missed a beat. IMHO there's nothing wrong with Olympic ARs.
Taken as a whole since SGW started Olympic their history is damn spotty. Especially their cast lowers and some really whacked stuff they built in the 80's when the got into the AR, and other out of spec stuff.
They did pioneer factory A3 flattops and free-float when that used to be a rather custom option. I'll give them that.
That said, as an AR parts ecosystem developed with lots of competent subcontractor parts mfg's and forgings, Olympic improved greatly.
They'll never be a LaRue or Noveske, but these days Olympic is a solid middle of the road, or perhaps decent end of the value end/bottom of the AR market and worth what you pay for them.