My first Ronbus Quanta 1.16 came loose at the edge after less than six months of use, and I was glad I got a replacement in time. Unfortunately the replacement also came unglued even after less than three months. I'm a female player, not particularly strong, and my playing style isn't aggressive. Therefore, I think this situation is largely due to product quality issues. Although I really like the feel of the ronbus paddles, I have to give it up because its quality problems prevent me from using it consistently.