Some parts were missing. But value for money is amazing

First off, the build itself was a mostly fantastic experience, the pieces were all there (with a few extras even!) and the bags were numbered! However, the axle and bar pieces were a pretty tight fit. At certain points I had to use a hammer just to get them in. This is good since it guarantees this thing isn't falling apart anytime soon but it does also place some stress on the bricks.
The stickers were a relief to have but aren't the same quality as LEGO. This is what I expected and for the most part I don't have any issue with it but I do have a problem with the sticker on top of the head. It isn't the right shade of pink. It's supposed to be lighter so it looks more like a scar. Not a huge deal but still a slight problem.

The worst part by far is the minifig. I'm glad it has arm printing but the headpiece is very clearly not the same as the original set. Instead, it's a bunny helmet with some printing. Additionally, the printing on the minifig itself is a tad bit too dark, it should be brighter.

Last complaint I have is with how the sword is held. It can plug into either hand and the axles REALLY stick in there. Like, you're going to need a pair of pliers to rip it out of the hand to place it in the other hand. This might loosen up over time making it easier to take out but I wouldn't hold my breathe on that happening anytime soon.

Other than all that I had no other issues, the build is solid and while the top is a little heavy that's not a problem since the legs have good balance (to a certain extent, if you make the mech lean forward completely it's going to fall over of course). At this price it's well worth it!