In my experience, using Eko has been helpful in hearing heart and lung sounds louder when there are things going on around you. It’s easy to use and easy to pair with the phone to record what you hear. Some of the things that they can improve on are 1) I forget to turn it off and the battery runs out in less than an hour. 2) the rubber tab that covers the charging port came off and now the charging port is exposed. Just cosmetically not looking good. 3) the original ear buds are small and of poor quality. It broke off within few days. So I got another pair from amazon and now it is fine.