I purchased the Rexton Bicore from Costco last week. I have been very happy overall with my KS9’s for the past four years. I was looking for long lasting rechargeable BIC’s and an update on Bluetooth tech. My Bi-core’s satisfy both of those desirables: battery life is excellent and Bluetooth connects easily and reliably to my Android Pixel and iPad. But… I’ve been having several issues. Hearing doesn’t seem to be any better with these Rextons than it is with my KS9’S. It’s more tinny and a little chirpy. Also, I do a lot of streaming, both voice and music and the sound quality is a huge step down from the KS9’S. It’s tinny , and can easily be heard by those around me even when I have the volume down! (deal breaker). As has been mentioned by others, phone call volume is way too low.
So… unless streaming and sound quality issues are resolved at my follow up visit at Costco, I won’t be keeping these. I’ll keep putting new batteries in my KS9’S, and hope Costco will resolve it’s issues soon with Phonak will come out with KS11’s.