While the build itself is interesting the final result is disappointing. Firstly it was very hard to get the robots working properly because some elements are out of tolerance or misaligned straight from factory. The balls that are supplied are also too big and not the correct ones. I used Mould King balls instead which sometimes worked. Lastly everything worked for a few minutes then individual pieces started falling apart since the tolerances of pieces are not great. I also had to use around 8 of my own pieces since there were wrong one supplied or missing.