I'm using the eufycam 2 system and it's been good, not great. Battery life is pretty decent actually. Video quality is so-so, just 1080p so not the clearest that's for sure. You can set up activity zones, and those are pretty good at triggering only on motion within those zones but occasionally I'll get some erroneous activity (or maybe it's so sensitive that it's picking up grass/leaf movement).
I've considered getting a few more to add better coverage around the house but I'll probably save my money and just get a good wired system, since you get get a 4k 8-camera system for a reasonable price at Costco. Just have to convince myself it's worth it to run the cable all over the house.