I dont have any cams with a built in viewer, but i have looked at pics with 1 that had a viewer and i didnt care for it because depending on how far away the animal is in the pic you sometimes cant distinguish on # of tines and length. When i check my cams i just swap out cards and put in new batteries if needed, and then its a race home to look at em on my computer. Why dont you tell us which cams you're interested in, what you're gonna be using for, (over a bait site or feeder or watching a trail) and how much you want to spend. That will give us a better idea of which cam you may want to get.