The bricks are pretty good quality, practically the same as Lego. I wish there was some mention of needing to get the instructions at rebrickable. I had a couple missing pieces and a ton of pieces with the wrong color. The wrong color luckily wasn't too big of a deal since all the exterior pieces were the correct color, but it definitely slows down build time trying to determine when you have the wrong color. The missing pieces I had to supplement from my own stash - I know this website will send you pieces that are missing but when you're mid build on something that takes up as much space as this, you can't really afford to wait around for a few pieces to ship from China.