I bought this as a gift for my boyfriend. He loves it. We've used it several times and my daughter carried it to school with an engine she built. The alcohol needed for this is a bit more expensive but worth it.
This engine is fantastic and totally a blast! Craftsmanship is very good for the price. Make sure it spins in its direction of travel smoothly. My 11yr old son loves it.
it is very cool and can use it to demonstrate how the engine works. Am very pleased with this prouduct