I have 54 hours on my Sonic 11 (I keep records.

)
There is some fraying on the edges of the leading edge panels (the cross seams not the long whole LE seam), and a little bit of wear on the strut end wear pads.
The upgrade wear patches on the leading edge are pretty useless. I make my own out of a little mylar sail repair tape laminated to some normal sail tape and they work fine.
I put some locktite on the cleat bolt and the eye bolt and have had no trouble with that since.
Apart from those minor issues the kite is brilliant. The build quality on the sail and the struts are outstanding.
I agree that the upgrades provided by the manufacturer are a bit "agricultural" but when you get light bar pressure, simple bar setup, short tangle-free bridles, no inversions and $400 cheaper than the competition there is a lot to love about the Sonic.