So I have given the FX101s so time and a bit of burn it. I like them a lot, considering I have so many other ear bud/IEMs. For the price they can't be beat - at least that I know of. The cool thing is, because they are cheap (by "our" standards, I have already started to mode them a bit.
First, I just put Comply Tips (T-400s fit fine). Make them fit better for me and does increase the overall sound quality a bit.
Also, because I can walk down the street and buy a pair at will and my biggest complaint is lack of iphone mic/controls (I use the mic and volume control a lot so prefer buds/IEMS/headphones with iphone-specific functionality (sometimes very limiting). I know you can buy a mic'd version of the JVCs (which I did on amazon for the heck of it, but the come with a generic mic, no volume control which is a must have for me). So - I decided to cut the JVC's casing open (did not snap open like I had hoped - there is rubber strip that holds the casing together), took an iphone ear bud cord/mic (white one that comes with the iphone), detached the crappy earbuds and soddered the white cable with the mic/volume controls to the new JVCs. I did have to superglue the casing back together which made them a bit unsightly, so I filed off the extra glue and took flat black model paint and gave it a coat to clean things up. We will see how long it lasts (lets hope my modding/soddering skills were adequate) but right now, I am rocking the FX101s with a full, operational iphone mic/in-control that, for all intensive purposes, I can not "baby" like I do my more expensive headphones!