The E10 doesn't work well with mic'd cables.
Much like old nokia and some samsung phones the ground prong on the headphone jack is reversed from the standard. The simple way to fix this is to have a inverted adaptor (http://www.meelec.com/MEElectronic_TRRS_Adapter_for_P_Version_Headphones_p/adptr-trrs-35.htm). That or have the mic depressed the whole time.
Although I thought Fiio fixed the newest batch of e10s for this issue...
I agree with goodvibes' comments that the cons you listed aren't really truly cons.
My only major con is the price, for 1/3 of the price the PFE012 uses the same drivers and you can buy the filters separately...only thing is it doesn't come with the iphone mic.
However a good overall review for a good IEM that still holds its own after so many years after its introduction.
Thanks for the review!
I agree with Plax, I have owned the westone 1 (essentially a um1), se215, and the PFE112 last. I regretted not listening to people who advised getting the PFE over other IEMs for the exact reasons Plax mentioned.