I see this camera with really good pricing - 4MP, 1/1.8" sensor for less than $100. The main difference I see between this and the pricier model, is the smart motion detection (SMD+ vs SMD 4.0). Is SMD 4.0 worth the extra $50-60?
There is also this:
Outputs max. 4 MP (2688 × 1520) @20 fps...