I went with Ridgetec cell cams. Didn't have a good experience with spypoint, which quit connecting to the network. Apparently the Spypoint were 3G, which went out of service in my area due to cell network upgrades. I had been trying to call Spypoint customer service for a week and put on permanent hold for hours at a time. I never did get to talk to anyone there, but discovered the issue myself while online. I get that they don't control the service in my area, but should have at least had a way to communicate and problem-solve...
I really like the customer service with Ridgetec. They answer the phones, and track issues with a computer ticketing system. You get emails asking if issues are resolved before the ticket is closed due to inactivity. This spring, I even got an email saying my cams were not operating optimally- their computers caught it and notified a tech. They were still working, but apparently not up to their level of expectation. It was right in the middle of turkey hunting, so I didn't want to run out to fix, so they agreed to tackle the issue later when it was convenient. They said whatever the issue was, it would be fixed while on the phone, or they would replace the cams.
I run my cams with 12v batteries. The AA batteries don't last as long as I want with my settings, and a 12V will run all fall and into the winter. I plan to get solar with rechargeable batteries made for the cam at some point.
No experience with other cellular cam brands.