Good idea and lots of features, but unfortunately unreliable
Advantages
Customisable settings for different cats
Quick relocking is generally very practical
App with status, activity tracking, and timer control
Hub and setup are generally straightforward
Fail-safe mode available for empty batteries
Customer service responds and tries to help further
Disadvantages
Exit detection on my device is unreliable
At times, my cat couldn't get out anymore
The error only occurred from inside to outside
Restart required by removing the batteries