If you haven't already, might try doing a forum search for "gw security", ... looks like there a few threads out there from folks that have experience with them.
Off the cuff, the cameras are 5MP (with what looks like a run-of-the-mill 1/3" image sensor). I have one 3MP camera (with an run-of-the-milli mage sensor), and while it looks great during the day, it stinks at night compared to my 2MP Dahua Starlights. I spent a decent amount of time tweaking that 3MP camera, ... at night, I can get OK-looking images (very noisy/grainy compared to the Starlights, but still useful)... as long as nothing's moving. If something moves (like a person walking by), the movement part of the image is a blurry mess. Cameras with more megapixels (and run-of-the-mill image sensors) almost always have an even tougher time with that problem.
