I recently purchased Costco's latest model Kirkland hearing aid, which is based upon Seiman's top of the line Pearl model. Both ear pieces have been returned for warranty repair several times.
I was a very early purchaser of this model, just after it was first introduced. I had to wait a couple of weeks to place my order. When they work, they are very good, comfortable and effective.
The problem seems to be an electronic failure after a few weeks of use. I suspect they may be have widespread problems with this model since the first turn around time for repair was two or three days, while my latest turn around has stretched to over a week.
While the warranty program is available I will continue to use it and remain with the product. For when it works, I am very happy.