Just got one myself. Major upgrade from an old 37" Toshiba. Sam's club has reduced it to $668 in store. For a 55" with 3D and IPS screen, the price is fantastic. Picture stinks before calibration, but now calibrated, its very nice. Can see some flashlighting on a blank screen, but it doesn't seem to affect any programs I'm watching. Wife thought TV was too big at first, but then we started watching Avengers in 3D and she was really enjoying it so I think she'll come around. See jaggies with fast motion, but I'm not sure how much is poor motion performance of TV vs the crappy compression from Dishnetwork. Have to watch some more movies and see if its better.
By the way, if you worry about LG panel lottery, the FPR technology that makes passive 3D possible is only being produced on IPS panels, so all LG passive 3D sets use IPS panels. That gives them fantastic viewing angles but mediocre blacks. Actually, FPR technology is an LG exclusive so all passive 3D sets from all manufacturers currently use LG IPS panels in them. The only passive 3D currently on the market not using LG FPR panels is Toshiba's ultra expensive glasses free sets. Toshiba, Vizio, and even Panasonic (for the ET5 series) all buy 3D FPR IPS panels from LG.