I waited 7 months for mine.
delighted after first session and disappointed after the last one (second).
My bad luck or a problem with waterproof quality.
My kite fell in the water. I was drifting 5-6 minutes to a shore. once I reached 1m deep water while drifting my lines got slacken and I lost the quark.
It got away itself - no kidding.
Then I checked that a bit of slack an lines allows the mount to release out of the lines easily.
There was water coming out of a LED light and a warning on usb port of too high voltage when I connected it to a port.
I have to say that the idea is great and I loved it once it did worked.
However would recommend to use a line leash just in case.
Contacted the manufacturer but they never encountered such an issue and no chance for any guarantee replacement. Only a discount if I buy next one.
It was expensive testing of quark for me. One minute out of four hour sessions cost me 1 USD ish
Wonder to know if anybody had similar issue please.
The manufacturer stated: The Waterproofing is a protection if its get wet or submerged for a quick period of time.
My answer is that EVERY kiter using Quark will drop a kite to the water sooner or later and may drift more than "quick period of time".
"Quick period of time"
is perfect definition to avoid ANY trouble
NB. Do not plan to buy the next one for a long time...