More than a year with my Nank Runner Diver 2 Pro and I couldn't be happier. I bought them mainly for swimming and they've been flawless — the waterproofing is the real deal and the MP3 mode means I don't need my phone at the pool. Sound quality is great for bone conduction, they stay perfectly in place during runs, and the battery just keeps going. What impresses me most is the durability: daily use, sweat, chlorine... and they still perform like new. Best purchase I've made for my training. 100% recommended!
The customer service was above and beyond! Incredibly impressed with Nank, their product, and their helpfulness!