The critical property of all similar systems is the way how you use it. Modern research systems, both based on depth sensors or cameras can in fact provide very good results if operated by a skilled person in a controlled laboratory environment (no shaky movement, proper light, no reflections, shadows etc.). This is a very different setting to using the system by a wide audience in the variety of all possible situations which might occur every day.
One of our goals is to bridge this gap and make a system which works well for as many situations as possible and can be enjoyed by as many people as possible. Still a very hard task to do. This will happen gradually, one release at a time. Therefore, we will very appreciate your feedback on using the app - both when it works and when it does not. This will help us to improve the app.