"The set took about a week to deliver from when I ordered it, which is pretty good. The box was so heavy and for a good reason. It was packed full of bags of pieces with two huge instruction books. You won't be disappointed. the build took me about four days, but when I got to bags number 5, I realized I was missing pieces. I counted the total number I was missing, and it was 99 pieces. VERY disappointed. I called in and ordered replacement parts. I hope LEGO will be more careful to include all the pieces next time. When I got the replacement parts for the set, then I was finally able to finish (It took two weeks to deliver replacement parts). After I finished the build, it looked truly magnificent, and the size of it is HUGE!!! I think the price is fair for getting 4100 pieces PLUS two smart hubs and seven motors. The set is very fun to play with since you can control everything with the Control+ app on your smartphone. Overall this set is very good, very fun to play with, well priced, and makes a great display model. I want to see lots more big sets like this from LEGO in the future!!"