What's the concern with Cam? It works well. I just stuck mine on silent mode and apart from fixing the startup every time windows did a major update, forgot about it.
Most people are freaked by it sending your pc hardware data to nzxt, no idea why, it's already sent to Microsoft, Google and half a dozen other places.
I did create an online accouunt, I know it is not exactly harmful to me, but the more control I have of the privacy settings of a certain program, the better to me - I would prefer not to send usage data, or if have the option to enable or disable it to my own liking, and not partially forced into accepting it, since the Cam software is fairly limitid in guest mode.
EDIT :I'm not completely against sharing usage data, and I have it turned on for a selcted few programs I currently use.
I don't like the available privacy options in Win 10 using an online account either, so it isn't just this specific piece of software.
I did say, that I prefer NZXT Cam over Corsair Link
However, I personally felt that the manual fan curve settings were unituitive and a bit "clumsy" to manipulate. I don't like the failure to automaticllay log into Cam when performing a reboot shortly after initially loading into Windows - for example after a software update, or consecutive driver installs.
And on some occations, for no reason really, the software just didn't launch with Windows, even if the setting was correctly applied in the software. Not a big issue, but when adding things up, these little things is what I personally dislike about NZXT Cam.
The way to apply program settings in preferences was poorly implemented, there was an (in my opinion) unneccessary extra step to actually apply changes to the program settings on each tab, which would reset the changes just made when swtiching to a different tab, if you accidentally missed this step - you were not asked if you wanted to discard or apply changes (in case one forgot) - and it was easy to miss.
I know, I just had to pay extra attention, so admittedly the error is on my part - this is however, not something I've run into elsewhere, which is why I don't feel like the software menu layout is optimally designed. This is down to personal preference though. But these are the reasons I can't say the software felt well designed to me personally.
But creating custom fan curves was even more unintuitive in Corsair Link - especially the silly way you apply same settings to the second fan.
But I know some people will have different personal preferences than mine, who actually really likes Link or Cam - and that's perfectly fine by me
Personally, I feel like there's room for improvement - but it also had features I liked.