Like most people with hearing loss, I regularly have trouble hearing on the phone. I make religious use of my amplified headset and the volume control on my speakerphone, but sometimes, it is not enough. It can be embarrassing to keep asking someone to repeat themselves, and dangerous if important information is being conveyed. I remember one phone call with an editor where I kept repeating what I thought I had heard to keep the conversation moving forward. It was very stressful and difficult for both of us.
After that call, I decided to try a captioned phone to see what benefits it would bring. It has only been a few weeks, but I am very pleased with it.