I purchased a DS-2CD2332-I from Amazon.
Shipping was prompt. The Amazon picture had shown a standard consumer red and white box with image of a camera and some printing on the outside, but mine came in a plain brown box. Beyond the packaging, it was not just a matter of warranty or reliability. Many features were simply inoperative.
It took some Google time to figure out how to read English and not ideograms.
It was set to a 50 Hz frequency standard, not 60 Hz. This had a drop down menu to change, but no way to save the selection.
In daylight, it was a great picture. The nighttime IR was great too. However, for unusual conditions, image settings could not be changed from the default. So, for example, faster shutter speed (and many other settings) had a drop down menu but no save button, which pretty much ruled out faster motion capture, such as license plate capture.
The built in analytics were simply non-functional. These were advertised as motion detection and face detection. Neither functioned.
At first, I thought this was typical of some third rate products which don't seem to have been subjected to beta testing. However, after noting that IPVM appeared to have had much better experience with Hikvision, I touched base with Hik USA who confirmed my camera was likely for the domestic Chinese market, likely with hacked firmware to "support" the English market.
Next I tried to communicate with the vendor who was fulfilled through Amazon, but never heard a peep after three emails from them. I used the email address on the card in the box (you may know the type: consumer please don't return this; instead contact us here).
These issues are a blot on Hikvision's reputation. After my experience, I tend to agree with Mr Nelson. Hikvision mass distribution seems to be a wild west. It took a fair amount of experimentation and reading to appreciate that this wasn't business as usual, but rather an inferior and probably hacked version. Fortunately, I hadn't purchased the quantity that I needed for the project (Arecont had taught me the importance of testing one before ordering the lot!), and Amazon supported a return with full refund. The time: well, that's gone.