Read recent reviews on Amazon, Newegg, and AVS forum - still dealing with it. It's a crapshoot, of course - so you may end up with one that works perfectly. It's got more features than the Yamaha, but you have to decide if it's worth the risk or not.
My refurbed NR509 has worked fine for over a year. Seems in the Onkyo world, trolls and haters rule the land.