The AI system listening to our kids is a game-changer. Really smart setup. Obviously there are some bugs (prompts a little repetitive or computer mis-hears a kid with speech issues etc). But lovely and our kids have been using it off and on for two years and love it (I can't speak to its 'results' since our kids are in a Spanish immersion school and therefore their English reading skills are lagging anyway, but Elli feels like a great support for that gap)