This approach seems ideal for my needs - not dependent on availability of a live lecturer or other participants.
I like the combination of listening, speaking, writing and memory testing.

There are some questionable moments, such as Flash cards, in this sequence: "How are you", followed by "How are you (formal)" -- since the first card doesn't indicate that it's 'informal', how am I supposed to divine which version they want? Also, as I've already expressed in a feedback, The gamification of the system, while overall good, sometimes causes badges / achievements to pop up at the most impractical moments (in the middle of writing an answer or recording my voice). If these issues are resolved, my ratings for the satisfaction and likelihood of buying again would go to 5*.