Worst: Falls out of my large-ish ear canals. Even largest earpieces dont fit well. Also does not connect reliably w iPhone XR. Anker $30 ones are better overall as Ive had them but lost em! Wld choose Anker/soundcore anyday. Controls SO SMALL u cant tell whch buttons which! Lol Agn Anker buttons u can even feel w gloves on in dark...these Sennhsr ones I had to modify to make it ez to find the power buttn. MIC is excellent n better than Anker. Sound is possibly better but not that noticeable to avg. ear But it is better sounding. Batt is truly 10h n longer than usua. Thats its saving grace USBC charging only. thats a con bc theyre more rare n pricier. Would not recommend unless u only value a great mic, sound n batt but can live w tiny annoyg buttons n tiny earbuds.