Just some tips for people new to these 'phones.. Don't put them on as it says on the Shure website all the time try this: Put them in as normal, hook them round the ear as normal, but then thread them below the chin and do up the plastic thing just under the adams apple. I find in this configuration I didn't get any of the "pulling" I experienced when doing them behind my head like Shure says to. Also, once fitted, lift the top of your ear up and out and push slightly on the bud again to het a better fit. Another tip = they thread them inside your clothes to prevent snagging! The next thing: I found the clear Flex sleeves uncomfortable at first, so I went with the smallest size of Soft Flex Sleeves (the greyish ones). These were fine for a while, but started to slip off the bud into my ear! I tried on the standard Flex sleeves (clear) again and it seems my ear has got used to it, and these are now comfy. They fit well, and THE SOUND ISOLATION IS BETTER! (I can't be having with buying the Foam sleeves all the time!). So go back and try the other kinds of fitting tpes every now and again to see if anything has changed! I hope these tips prove useful for E3c users. For anyone considering a purchase of these, or any other similar high-quality in-ear 'phones I say go for it - you'll never go back to the Apple buds again!