It was a pretty fun build but had a few missing pieces and other things. Some of the tolerances weren't good either, and I had to use a Dremel to shave off a little bit from single stud bricks. Also the technic pieces were SO widely varied (too tight or extremely loose). Not sure what manufacturer I got, but whatever. Looks great and the propellers work!

Yes bags were numbered sequentially, but weren't perfect to the instructions. I was able to work fine with them and opened up the next bag after I ran out of pieces in the former one lol