"As far as I am concerned, the Fire Plane 42040 is best in class for the <$100 technic sets.
For me the build was 4 very fun and stress-free hours while watching some movies. I was a little sad when it was done.
The set looks great with or without the stickers (I left them off.) The control surfaces are very responsive and the controls for those surfaces is well designed an unobtrusive. Most importantly the build quality is just top notch. The set seemed ambitious for $50 so I expected some build compromises but found none. The designers should really be proud of this effort, great work.
Also the set contains a full instruction book for the alternate build with these pieces which is a nice touch."