Yes, that's the one (Samsung only has one 5K monitor). Most reviews I've seen have been pretty positive about it, but it's good to hear a dissenting opinion as well.
I believe the viewing angle problem you're talking about is due to the anti-glare finish. It's a trade off for sure (one that some people would not want). I assume that's why Apple offers their consumer 5K monitor with or without that finish.
Apple also has a Pro 5K monitor. LG also has one older 5K, and those are the only 5K monitors currently on the market.
It's true that the anti-glare works OK. By that, I mean that I've never thought about it, and now that you mention it, I realize it's a good thing since I never felt the need to complain (I don't usually hold back). The screen is also very sharp and doesn't exhibit the weird texture some anti-glare coatings used to have.
However, in that particular office, there are no strong sources of light that would shine directly on the screens, so it's hard to say how good it actually is, especially when comparing to other models. The screen can also get pretty bright, so it should be able to handle most lighting situations in an office.
I type this on a Dell U3223QE, on a black background, with two lamps right behind me. The lamps aren't very bright, but the room is fairly dark (it's still night here). I can see the glare if I pay attention to it (didn't notice it before reading your comment). This is a 32" screen, sitting at roughly the same distance as the Samsung, yet it doesn't exhibit the viewing angle issue at all.
I do know that having a brightish window behind me with this screen requires upping the brightness, or the glare would be a pain. Never tried the Samsung in that configuration.
I believe the viewing angle problem you're talking about is due to the anti-glare finish. It's a trade off for sure (one that some people would not want). I assume that's why Apple offers their consumer 5K monitor with or without that finish.
Apple also has a Pro 5K monitor. LG also has one older 5K, and those are the only 5K monitors currently on the market.