Not great, especially for the steep cost
I downloaded the app for a week’s free trial, to see if I would keep it. Functionally, it’s grand, if not a bit messy to navigate. My toddler often gets stuck on a game she doesn’t like as the app will redirect the kid to whatever is next in line after finishing the previous game. The suggestions are generally age appropriate, even if the teachers voicing the games range from charismatic to terminally bored. If you plan to use this in more than one language, don’t. My daughter speaks German. Some of the vital menu options are in German, some in English, some in Dutch(?!) Some games have appeared exclusively in Spanish and in Polish. For free I’d put up with it, but €20 a month for sloppy localisation is not it.
