This little heli was a fun build. Took me about 4 hours, but I wasn't in a rush, just enjoying the build. A few very tiny pieces to install that were a challenge. It took quite a few tries to get the rotor beveled gears to sync properly, but again, I enjoyed the challenge. I got it running great and it's ran perfectly about 20 times. I'm using Methyl Hydrate for fuel and it seems to work well. It arrived quickly, the kit was packaged well and there were no missing parts. Even came with a few spare parts. Instructions weren't great, but I managed to figure things out with the pictures. I would certainly recommend this kit and I'll definitely be ordering from EngineDIY again.