Son was quite excited to have a go at making this - he's rather young for it and was given it as a gift, but with adult help he can usually handle these sorts of things pretty well, being a bit of an avid mechanic.
At first he found it interesting to put together, he loved connecting all the parts, however the drawings were somewhat inaccurate which led to total confusion (the pulleys do not look as drawn when made) so it managed to fox me (44) and much more technically adept husband (57)for quite some time. Lots of to-ing and fro-ing and reconsidering how we'd done it. Very frustrating.
As a launcher it was somewhat lacking too. The suction cups only stick to certain surfaces - a tiled floor worked for us - but no table would hold it. A major design flaw - the front 'foot' is bolted through the front of the launcher plate and sits right in the path of a plane! We couldn't really get it to launch anything further than a couple of feet! Easier just to use your hands!
As it was so frustrating to put together, it wasn't really educationally doing much for any of us, so the fact that it then didn't really launch planes well either, was a shame. Glad we didn't pay money for it, but feel bad for the gift-giver who did.