I run 3 at the moment. For the money I don't think you can beat them. You can usually buy them online for $79 + s&h.
Pros - Long battery life, affordable, very easy to operate, clear images as long as the object isn't moving quickly and night pictures are good as long as they are within 30 feet.
Negatives - Night pictures beyond 30 feet aren't good at all, moving deer will be blurry, you can hear the click when the picture is taken and so can the deer.