Tyee--I understand how some folks initially come up with the feelings you do, but I think most come to that conclusion without actually trying them. They are, in my opinion, missing the boat. One of the chapters in my recently-released book (My Neck of the Woods) is 'Are Trail Cameras Traditional' and it addresses this question in great depth and with much introspection. I do not think they provide much help if any in killing a big buck; I have never found them to reveal a set-your-clock routine of an animal in the woods. In fact, rarely do I get more than one picture or two of mature bucks. They are merely a window into the wildlife's world and help tell you what animals are on the property. Much the same as spending hours away from your family with a video camera in hand or watching through a spotting scope. I think of them as family-friendly scouting, not so much as in where to put a stand (as I am very careful not to put them anywhere near my actual stands), but in simply getting pics of bucks on the property.
They can also be used in a variety of ways. Gene Wensel recently sent me a dozen pics of all kinds of species hitting gutpiles in Africa which was very cool.
As for cameras, I have limited experience with other brands, but have been TOTALLY satisfied with Digital CamTrakker's shutter speed, reliability, rechargeable battery life, and sensing range. These are the four main things I believe you should look for in a camera.