A great source of fun! I love Pimoroni for making PCBs beautiful and this matrix is no exception. It looks beautiful and its legs make it super easy to use as a desktop toy. The LEDs are superb, bright enough to be visible on a sunny day and also provide a nice glow at night. Plenty of buttons make it easy to add many controls to your application. So it's just a matter of writing a handler for buttons pressed while when there is a limited amount of buttons you have to build complex sequences to control all features you want. Finally, Pimoroni SDK is easy to use so it's almost plug and play. I spent some time to understand how to import all required libraries if I intend to keep my project in a separate location from Pimoroni's Pico examples directory, but anyway, quite easy to sort out all setup tasks. So overall I'm pleased with the product and recommend it to anybody who wants to play with LED matrix.