Waaay back I had a Moultrie IR4 - huge, ugly, poor range, and long delay... but it worked. It's still around here somewhere... but retired.
SUMMARY - Not a bad camera for it's day, but technically inferior to the newer models. Some other users had LCD issues in the cold.
During a lapse of reason, I bought two of the 2 packs of cheapo WildGameInnovations at crap tire... 3 out of 4 did not function reliably. Returned all the next week.
SUMMARY - Garbage
Bought a single Spypoint IR5. Awesome pics and battery life, range, and fast re-shoot. Still in use, 5 years running 365 days of the year.
SUMMARY - Great reliable camera. Quick setup. Only downside is the battery status bar shows full, when batteries are near dead.
Bought 2 more Spypoint IR6 cams, Crap tire exclusive. Both worked well... but they didn't have the fast re-take option of the earlier IR5. Sold them both.
SUMMARY - Reasonable cameras, but I missed the fast recovery of the IR5
Bought a Spypoint Force 11. Works very well. Much improved images, especially daytime. It's out 24/7/365, about 1 year now.
SUMMARY - Fantastic images - quite reliable so far. Good battery life
Lastly, a friend of mine has a Stealthcam - which I helped him setup... Not sure the model. Uses 8 AA batteries, very good battery life.
SUMMARY - the rotary selector is great for someone who doesn't want to screw around navigating menus. Image quality is shiitty
I have had very good success with the Spypoints.
Night shots can be a bit blurry on moving animals, due to the shutter being open longer than daytime.
I wouldn't hesitate to buy another Force 11.
Design Flaws -
In general, camera manufacturers should use a low-light sensitive CCD eg Exview HAD, so that the shutter can be faster at night.
In general, LCD screens can prove flaky after prolonged use in -20C temperatures. LED screen would be better.