I have been comparing the Costco Resound Lynx2/Cala and Kirkland/Rexton KS7 (Siemens). Have been advised that one difference is the Rexton HAD some problems with moisture/humidity, but have added a coating that is suppose to fix it. The Costco Techs (2) said the Resound has better circuitry, reliability, and service;however, warranty seems the same. Neither one is Bluetooth except with a EXTRA Clip to buy; however, the REXTON has an Excellent free Android App that does not require the Clip if you don’t need Bluetooth. The RESOUND does not support Android without the Clip except for I-Phones and some Samsung phones. The REXTON app lets you control volume, microphone and other items. I called Resound about their app and the Tech, who was not honest, said Rexton was the same as ReSound and required a Clip. I called Rexton and this is not true & you can find their app on Google. So, If you don’t want to pay an extra $200.00+ for a Clip, plus another $600 more for the Resound, and have to run back to get your HA adjusted all the time at Costco, the REXTON (Kirkland) is probably a better Value. IF you do not like Kirlland/Rexton, you can return in w/i 180days and buy the Resound. To me Resound is not worth $800 or more just because they want to sell a Clip and not write a good App for all Android phones.