I am using S Series 5, 70 days an had both instruments replaced due volume shifting and left unit “Squelch” issue, feeling of being off balanced.
Audi turned off all automatic settings in the new set, now I have feed back and a constant hiss, comprehension down in noisy environments.
May be just my Audi, but I am thinking of abandoning Starkey in favor of the Rexton Cobalt 16
Also keep in mind Starkey does not offer Blue tooth natively. So if external connectivity is a consideration for you Starkey may not be the best choice.