I like most that we can choose any 8 hours through the month and are not tied to a specific day and hour. My son loves the independent speed with all the help he needs and wants available to him.
Have rated a 10 in the past- but right now child is really stuck on some specific programming tasks that are taking a huge amount of time and he is having minimal success working past- all of which is occurring at a belt level that had about 3x the number of tasks as previous belts to begin with. It is sapping his desire to continue with the program (and he is motivated and capable).