Here are a couple of test pics with the Phantom 2. It does pretty well in daylight, as I noted, and even into the evening. The photo of my backyard was taken on a cloudy day just before sunset. Camera info indicates that it was 125th at f/2.8 and ISO 178.
Another drawback is the extreme wide angle lens causes some distortion as can be seen in the curvature of the horizon. Distortion not as noticeable in the photo of me where lens is pointed more or less straight down.