We have a bird feeding station in our yard. Mainly to feed the woodpeckers all year, but in the spring, the Western Tanagers return.
Pros on the GoPro: Again, I cannot believe the quality of the audio that comes out of these cameras. Encased in solid plastic, all the twangs, peeps and bird feet hitting the pole came through loud and clear. At first, I thought there was something wrong with the camera until I realized it was wild sound.
Cons: The cameras got warm. It's an issue with these and there are ways to deal with it. Live and learn.
The Go Pro idea of cameras with the emphasis on them as a capture device is a different view of photography than my usual. It makes the event more important than the camera work. I'm finding it's interesting and fun.