A camera advertisement that says both "international version" and "not support firmware upgrade" is misleading. If you can't upgrade the firmware, it's not an "international" version, but rather a chinese market camera, with the firmware hacked to english language. There's nothing particularly wrong with these cameras. They don't have the low-light capability of the international starlight models, but otherwise perform just as well. Until recently, it was a simple tradeoff between how much you wanted to spend vs. low light sensitivity. Recently, however, dahua has thrown a monkey wrench into this with new NVR firmware that actively rejects chinese market cameras. At the same time, more 2 mp international starlight models have become available at lower price points. While the starlights are still more expensive, the gap is less than it was just a year ago. Coupled with the NVR rejecting the chinese market cameras, they're a less attractive choice than in the past.