I have their eufycam2 and indoorcam 2k (non pan/tilt) in HomeKit using HKSV.
I DO highly recommend their IndoorCam 2k non pan/tilt in HKSV. It works quite well and hits a great price point for good quality video and overall product. It’s quite stable for me since they’ve gotten past their initial buggy HomeKit releases. It reacts quickly and catches everything well.
I DO NOT recommend the eufycam 2 series for HomeKit Secure Video use. Or any battery powered camera in HKSV. The eufycam 2 system works well because it can manage the battery drain on camera, and HKSV necessarily bypasses this. It’s slow to react because it takes time to power up before it can start to record. It’s really only a decent solution for places where you simply can’t run AC power.
Fortunately, I have very low-traffic areas where even with HKSV, I can get 4-6 months battery life out of the eufycam 2 - no false positives, 0-4 clips per day. But it still misses the start of every event. It seems to be reasonably linear math, so if you double the activity, you basically halve the battery life, in case that helps.
I don’t recommend the eufy cloud for either camera. And I’m neutral on the built in storage. I don’t use it, but i have higher security requirements than most.