Piececool 3D Metal Puzzles Mecha Model Kits, Red Thunder Figure Models Building Kits for Adults, DIY Brain Teaser 3D Puzzle for Teen Students Fidget Toys Perfect Birthday, 522 Pcs

Very well made package. The box is huge, filled with a big book of instructions. All the runners were thick metal pieces. Time and patience needed to put together, definitely expert level.

This is the third Piececool 3D Metal Puzzle I have assembled. It says on the box that it is a 7 Star difficulty but I don't think it was any different that the other two that I put together. It was just more of it. I have two more on the shelf to build and looking forward to them.

Very fun to build, and so cool!

You need the right tools to assemble this project. Follow the directions they are spot on. It was a well designed project and results were pretty cool.

This is a beautiful build, but it is VERY CHALLENGING!!! There are a lot of compound curves, and I wish the instructions were more detailed. Lots of tiny pieces, so be careful - you are in big trouble if you lose a piece.

Could be more difficult my brother in law only took 3 days to put it together

Awesome Design, however small. Magnifier needed to read instructions.

These models have many parts to them but i think it makes it easier overall for the whole thing Vs. Some of the smaller models out there The finished product is really great!