My only complaint was that the instructor made me spend my first 7.5 minutes on the bottom of the tunnel and wouldn't turn the wind speed up so I could actually fly and feel the feedback. If I wanted to dirt dive, I'd go outside and do that first. All that got me was some bruises, scrapes, and about 100 bucks wasted. Once I got into my second block with another instructor it was much better and the instruction was great. Zoltan really spent time to make sure I was learning and was happy with everything.