The grading system is all over the place. They have a colour coded system that is meant to reflect proficiency but it patently doesn't correspond with any of the lessons. I completed all the modules available, everything was correct but the colour coded system gave me 1 green tick and 4 yellow symbols. It makes no sense.

I asked for an explanation for this but the response made little sense too.

I think somewhere in the Rocket system is a great app waiting to break out but it is currently too cumbersome which is a pity.

They ask users to write something awesome, they are assuming people think the app is awesome when it isn't yet.