I had several complaints.

The wheels are far to soft and light, and will either dent or fall apart shortly after flight.
The plastic piece that you are asked to tape down over the tail while the glue is drying will peel paint off the plastic and look like crap.
The hinges are just a pain in the arse to get assembled and mounted properly
My covering was EXTREMELY wrinkled. I was able to get it mostly cleaned up, but it took ALOT of work.
The holes for the wing dowels had to be opened up for the wing to sit in the saddle. Once the wing was able to fit, the oversizing of the holes made the wing a bit wobbly. I had to add wing saddle tape to get a good seal.

This seems like a lot of complaints, but I have been happy with how it flies. I just wished I went with more engine than an O.S. 1.60fx, just not the vertical I was looking for.