I have had 7, 2 of which I still have(VSX3D474SV[TruLED] and VSX323SV[edge lit Razor]) and none of them have yet to have a problem. The oldest is a 26" I sold to a co-worker and her kid still uses it daily for 360 gaming, that dates back to 2007 I believe. The other 4 are in relatives or friends homes and used daily as their main sets, and trust me, if they had a problem, I'd be hearing about it. I feel fortunate though and I may be a rare case. I don't know if anyone can say that in the past 5 years they've had 7 sets from the same manufacturer and no headaches to report. Places of purchase range from Sears.com, Kmart in store(the 1st one was bought there, kmart carried them and were practically giving them away), Samsclub.com and Sams in store.
My 47" is an excellent set, regardless of the name stamped on it. I don't use it for 3D, the 2D picture is outstanding, I'm spoiled by a good IPS panel that's fully back lit with local dimming.