The illusion is really a clever and compact effect. I've personally built the illusion and I had NO real problem with understanding the diagrams and instructions. All the wood cuts are straight and the brake down and set up using the "hinged pin" system is brilliant. The only problem is that the measurements are in "metric" and not "inches". So if you want to build it as described, here in American you will need a conversion chart as I had to use. This was an inconvenience and slowed down the build. If it wasn't for this, I would given this 5 stars, but because of the metric measurements I will have to give it 4 stars. I still would highly recommend this very inexpensive illusion if you have basic building skills.