Check out chasingame.com they've got a good review.
These cameras only last for 6 or 7 days so not good for ppl like me who live hours away. They r however working on a external power supply that could last up to thirty days so that could be nice. Also, if the deer r further then 20 TSS u can't really tell the size of the bucks it has a zoom feature but itz real blurry.
I think it'd be fun to stick one of these high over looking a food plot u may not be able to identify each deer but u could easily get a general idea of where the deer r entering an exiting the field.
My opinion, these cameras r good for scouting not for inventorying your deer like tradition cameras