I bought one for Claudia and have not flown it from the kite. It seems very similar to the regular T4 but has minor and reasonably nice improvements including a waist-level finder, a better LCD display, and modest weatherproofing. I can add now that I've taken around one hundred rolls of KAP photos using the T4 and it has held up remarkably well. The faster shutter speed helps, I think, as I seem to have relatively few blurred images - maybe 1 in 20 except when flying in low light. Film advance and rewind have worked flawlessly.
Exposures are generally well balanced.
The camera hardly has a scratch on it. My single complaint is that the lens tends to flare when the sun is near the frame and I've lost interesting images due to this. I've been thinking about a velcro and cardboard lens hood. At that time I retired KAP Rig No. 1 and the original T4 it carried. After fine service it has now resumed the terrestrial life of a normal camera.