First Mega product I’ve purchased, love Tesla so wanted to give it a try. Build quality of blocks are not that solid (compared to lego), often flimsy pieces require extra effort to lock in place. Instruction book is missing pages starting at page 52… instructions are not straightforward- transitions like flipping a piece are not always clear. Reminds me of a knock off ‘space wars’ set I got from China one time. Expected better quality for the price!