BOUGHT THIS ONE TO TEST AFTER BUYING SEVERAL OTHERS.1.SEVERAL EARPIECES TO TRY, LARGE ONE FIT VERY WELLNOT FALLING OUT. TAKES MOVING IT ABOUT AFTERTRYING DIFFERENT SIZES. NEEDS TRYING DIFFERENTPOSITIONS IN EAR TO FIND BEST FIT AND SIZE. BEPATIENT. WORTHWHILE. COMFORTABLE.2.TESTED SPEAKING TO OTHERS, HEARD WELL, THEN ASKEDPOINTEDLY IF I WAS HEARD WELL. YES, MICROPHONEWORKS WELL. IF IN NOISY ENVIRONMENT, NOTHING WILLWORK WELL.3.HEARD OTHERS SPEAKING VERY WELL. GREAT FOR CAR USE &amp;ANYWHERE YOUR HANDS NEED TO BE FREE.4.WINDING: WORKS WELL. NEED TO LEARN HOW TO WIND ITBACK UP, PULL CORD AT BOTH ENDS TO WIND EVENLY. DONOT PULL ONE END ONLY OR IT WILL TANGLE. THE PRODUCTNEEDS BETTER CUSTOMER INSTRUCTIONS IN ITS USE. CARUSE: STICK IT IN YOUR EAR BEFORE DRIVING OFF IN CAR.REWIND WHEN YOU STOP THE CAR.5.WILL BUY A BACKUP AND EXTRA EAR PIECES. AND SOME ASGIFTS TO OTHERS. GREAT PRODUCT!