I have only had these a few days but am thrilled with them. I had a set that cost me over $5000.00, these work as well as they did! I was hesitant, but after reading the reviews I figured I would give them a try. I did not have an adjustment period because I have worn hearing aids for around 7 to 8 years. I did try different settings and ear pieces and found the right combination for me. If you are on the fence – get off of it – order a pair today. Well worth the cost.