For anyone new to IP cams who is considering buying one of those high MP cams, maybe this will help you decide. I've had a 4 MP Hikvision turret for almost 3 years and I was never really happy with the night vision although it looked great in daytime. I added external IR and spent hours tweaking settings. I ordered 2 IPC-HDW5231R-Z from @EMPIRETECANDY several months ago that I am very happy with so I ordered a IPC-HDW5231R-ZE from Andy and got the usual great, fast service. So here are short videos of the neighbor's cat passing through, both using the cam's IR and the external IR. Use 1080p for best viewing on Youtube.
4MP Hik
2MP Dahua
4MP Hik
2MP Dahua