I have had several issues with my D7000 and have spoken countless times with them over the months, and nothing - absolutely nothing - has ever been resolved.
They have no knowledge whatsoever of their products. None. Their website has lots of incorrect information posted - I had to call them before I even bought the set to ask them to verify some info on their site, and they were clueless - after 2 different reps they admitted their site was wrong on their specs.
I don't know how many times they promised me a return call within 24-48 hours, yet never did. At one point, they had me escalated to a "tier-2" knowledge base specialist, yet every time I called them I had to start at the beginning and work my way up the chain again, every time. It was truly painful.
Being my first plasma, I wasn't familiar with the dithering in 3D mode. When I called about this, they had never heard of what I was describing, and said it was defective. Days later, another rep told me it was normal, but never explained what it was or why it was normal. It wasn't until I read on these forums that I learned it was called dithering and was completely normal.
They were just as clueless regarding their blu-ray player's inability to send video files (mkv) encoded in 23.976 in 24Hz mode, even though it had an "auto" 24Hz mode. Apparently 2010 blu-ray players had a 24Hz mode that worked with digital files from USB just like blu-ray discs, but 2011 players only send 24Hz with discs, not digital files off the USB port. I must have put in several hours total trying to get to the bottom of that issue. They knew nothing about any of that. The blu-ray player skips on discs badly also. My Star Trek original series blu-rays are unwatchable on my player due to the frequent stutters and skips. As usual, they offered nothing but "try using a lens-cleaning disc". Brand new player, mind you.
Bottom line, their customer service is absolutely terrible. I have never been happy with my D7000 due to several quirks that really add up to an annoying experience, and their customer service is as bad as HP, which is saying a lot.
Their firmware updates are a joke as well. Just look into the whole "fluctuating brightness" issue on the dedicated thread - they make it a nightmare to obtain and use their fix - and in fact, the only way for me to use the fix at this point is to invalidate the warranty and use the service menu hack, which I will not do. Their built-in media player is very stuttery and has lots of codec issues with some files that it is supposed to play - I tried an mkv last night and it wouldn't play it, saying "unsupported codec", yet when I tried it on their blu-ray player, it played. A simple firmware update could add codecs and improve the media playback experience, but they've done nothing like that, ever. They keep focusing on useless "apps" instead of polishing thier existing features and improving them through updates. I'm willing to bet their new "upgradeable" slot in their 2012 line is just a gimmick, and I'd be shocked next year if they actually offered anything remotely useful through that upgrade slot.
For me, it's easier to just take this as a lesson learned. Don't rely on expensive products from Samsung because their customer service will leave you high and dry. Luckily I bought the trade-in program through Best Buy and I am pretty close to pulling the trigger on a 2012 Panasonic. I gave Samsung lots of chances to make things right and they never left me even close to satisfied.