I bought this as a Christmas gift for my Dad. He's a lifelong rural minimalist. Stibborn and not wanting to admit hearing loss, I got these to 1. make it simple to drive 2. give my Mom a break from my Dad's maxed out volume of his cowboy shows. They worked. He has been using them daily, leaving one in the car and one in the cave. I used my printer, took the instructions, and then summarized, printed, and laminated a cheat sheet. The instructions are clean, and my Dad has not asked for help with this "dang thing" not even once. I believe these are a good, quality product.
Q: Ease of use?
A: Simple enough for everyone