The 2015 model was notorious for leaky valves so once the first one started leaking I took the bladders out and got them professionally resealed and have never been an issue since. I keep them inside with the AC so they're not out getting damaged by sun/heat.
I also have the same but a 15m kite I have used for about 20 hours but the 10m listed here is only about 4 hours. Obviously no tears/rips or even pinholes.
Only selling as I don't get much opportunity to get out these days.