"The product itself is ok, expensive, but ok. Absolutly no instructions are provided short of how to install the batteries. There is no literature provided pertaining to how or what the thing is to work with. No mention of what LEGO app or what LEGO controller is required to make the thing useful. VERY, VERY, VERY poor in this respect. for the price one pays for this thing the very least LEGO could do is provide some information. As is it the user has to go figure all this out for onself"