In summary: great app. I use it almost daily. Would recommend for sure.
Pros: loads of choice (including a very diverse range of topics/scenariOS), good UI & UX. Really appreciate that a lot of it is offered for free.
Cons: Due to the large amount of choice, and variety of speakers/teachers, you do need to do some searching and vetting yourself in the beginning, as some of them aren’t as good as others, and this is very subjective. However there are definitely enough options available even in the free version.