I have one of the models that only takes a max 2GB card. It really works well. First time I set it out, I didn't get anything for a week in the woods. Thought it may not be working. Moved it to another location and had 107 photos of everything but cougar. No bait, apples or anything to bring them in either. Location, location, location. Very good photos, too. My avatar is one of the photos I got of a 4 point bull.
I like mine and will buy another soon. I like the small size, use of AA batteries, 40 degree angle of view is very good and mine will even pick up movement right at the edge of the frame (got a bunch of elk and deer feeding at the edge).
I'd say buy it. Btw, a 2GB card will store over a 1000 photos at the 5MB resolution. If you want to do videos, then it might be good to look for the newer model that will take up to 16GB cards.