I purchased these over a year ago. Sound quality is excellent and customer service qis outstanding. But these devices have a fatal flaw: they are easy to lose. Though I use the largest & best fitting sleeve, they loosen and fall out easily, especially when I bend forward.
A month ago I was wearing them when I entered a crowded music venue. I had a mask around my neck so I pulled it up, trying to stay safe from COVID, and I left immediately. 5 minutes later I found that I had apparently dislodged one of the hearing aids. I returned to the venue the next day, searched the foor on my hands and knees, searched the street and sidewalk with no joy. Sony tells me they cannot replace the single aid but will sell me a new set at a 30% reduction. I’ll pass. Much as I liked their quality, I would not risk buying these again, even at a steep discount.