I also had very good luck using them, , but will admit I only used them with pictures, NOT video!
the main key is making sure its placed where it gets all day sunlight or as much as possible
on picture mode I would get over a yr out of battery's and that's with 500-900 plus pic's ever week!
Now when I had a moultrie with there way back when cell plan deal, even with the solar panel and a external battery, I couldn;t go more than 2 weeks without the battery;s getting drained!, but that was a older system, say, 2010 ere like LOL
I am sure the new er one's are more efficient!