I actually just got mine last night. I've had my 2010 Samsung UN46C7000 for just over a year and these are the first pair of 3D glasses I've tried. I refused to pay $200+ for something I wasn't entirely sold on, so I waited, only to find out that Sammy switched over to Bluetooth for their 2011 models.
Anyway, my experience thus far has been above average. I know there's some ghosting issues with my TV so the fact that I've seen a bit hasn't been surprising/upsetting/unexpected. The only time I found it distracting was the PS3 Killzone 3 demo and most of the time I didn't see any at all. Other stuff I demoed - mostly movie trailers and game demos - looked great. Wipeout HD in particular. I wear glasses and they felt comfortable enough to wear over the top. Build quality is much better than I was expecting.
$30 well spent. After some more testing I'll probably be picking up 3 more pair.
Also, I experienced no sync issues, and the box they come in makes for a nice padded storage case.
My 3D experience is only 2 hours old so please take that into account. I wish I could compare them with some Samsung models, but like I said, I'm not forking over that much money.