A lot of these reviews are based on the old version, which lacked several important features that are on the new version. I bought 2 of the new version and I am quite happy with the purchase. It is rechargeable, has light level detection, and is pretty well-made. I tried to find other ones on Amazon and this was the most reliable curtain opener.
This product lacks Alexa/Google Home integration, but if you are just having it open and close by time/level of light, then the app is sufficient. If you want voice control, you will need a hub.
Overall, I am happy with the purchase. It works well for me and also the customer service is great.