I have had two of these out since the beginning of September and both cameras are on their first set of batteries (3000-4000 pictures with each camera). These cameras have been taking about 500 pictures a week over the last few weeks and the cold weather hasn't been a problem for them.
If you get one, use lithium batteries. A friend has one of these cameras and only got a month out of a set of alkaline energizers.
The only problem with them is they only work with SD cards that are 1 gb or less. If you put a 2 gb SD card in them they will only take one picture like an earlier poster stated.