I have been using Covert trail cameras for the last 3 years and have been extremely pleased with their performance. So far I have used the following models: Covert II, HR 8.0, CA 3.0, Reveal, and Extreme Black 60.
Failure rates/problems are way less with Covert cameras than what I experienced with Cuddeback cameras. Covert customer service is also "tops" in my opinion. Whenever I did have a problem, I sent the camera to them and it was quickly replaced with new one.
Last year, I tried the Extreme Black 60 and was very impressed with it. Daytime photos were exceptional. Nighttime photos were good, but sometimes had motion blur. I overcame this slight weakness by setting the camera on 3-shot burst and 30 second interval. By doing this many of the nighttime photos came out clear and sharp. What I was most impressed with was the increase in buck photos at scrapes compared to other cameras (white flash and red glow). None of the deer appeared to notice the camera and continued to visit the scrapes.
A few weeks ago I have purchased several Covert MP6 black cameras (smaller version of Extreme Black 60) from Wing Supply. I expect similar performance from them as the Black 60.