WIN BUFFET on 236 shopping center with Marshalls
It's been at least two/three years since I went (never found a reason to go back) - my impression was that the place was VERY ordinary, though the sushi chef at that time shaped some lovely items (that didn't taste like much).
But - hey! It's right across the street from Hee Been and TemptAsian - and if you carefully discriminate between the American sections of the menu and the Chinese sections (it's all in one folder these days) TemptAsian hasn't lost ALL of its chops.
I've been in there a few times. It's pretty typical of that sort of place. Get a table within sight of the buffet and watch when something comes out of the kitchen. There's a sushi counter that's just OK.
I've tried all of the restaurants in that shopping center and, chowhoundlessly, my favorite is Valentino's Pizza.
For a pig-out I prefer Bamboo Buffet on Jefferson Street, across Leesburg Pike from Skyline Towers. Peter Pan Buffet at Fairfax Circle had some good reports here a while back but I haven't seen anything about it lately. I went in there once at lunchtime, the line was long, it smelled kind of funky, and it was a buck or two more than the other places, so I didn't stay.