Just got back from vacation and rushed into the kitchen where the Livewires package was sitting.
I'm sure the people having fitment issues are in the minority, that was still my number one concern. Being new to custom IEMs I'm still not sure how you're supposed to get these things in, but I got the left monitors in right away. The right monitor I had a few issues with, but after some ramming and twisting, I think I got that one in there too.
I'm not an audiophile by any means, but using my previous Zune headphones as reference, the Livewires have about the same amount of bass (which, with the Zune headphones, I thought was perfect. Not too much, not too little), but everything else sounded way clearer and crisper. I've got some uncompressed audio files to test out, as well as a few other devices (currently using the Zune 80), but right now, they sound pretty good.
I can post up some pics if you guys want.