I have several of the Moultree cams and they work just fine. Are they the best,,? No, but they do their job as long as you set them up right!
1st) Cut and trim anything that will be blowing around a lot in front of the camera, they can not be in an area where there is a lot of branches and things moving around in the wind or you will have 500 pic's of a fern moving around,, not that's ever happened to me

(several times

)
2nd) You don't want to place them on a cross trail where the critter will just walk by the cam, there trigger time is just to slow for that most of the time. Face the camera down the trail so it will have time to pick up the motion and I always have mine on 3 pic burst to help insure I get atleast 1 good pic.
3rd) Depending on what critters you want and what type of area you place your cam,,,, I put mine low to the ground at times to make sure I get Bobcats, Cougars ect..... a bit higher for Deer and Elk, If I have an open area like a clear cut then I'll place the camera height angling down so it wont pic up the tree blowing in the wind way out there, YES IT WILL DO THAT LOL...
4th) If you are in an area with an apple orchard or you put something like an apple block in front of the camera then that will help get the Deer and Elk to stop long enough to get some good pic's.
5th) ALWAYS shut off your camera before you take your S/D card out,, Overe time if you do not shut it off before you do, then it will lock up your card. I figured that one out 4 cards later

I'm sure I'm leaving some things out but I hope that helps, best of luck to ya and have fun!! Here are a few pic's from my cam set ups.....