"meh" isolation? are you kidding me? I was using stock narrow bore red eartips, getting a decent seal, and not a bad isolation. I mean, it's not dead silent like you get from RE300 "earplugs" or UM Pro "stage plugs", but it's on par with a lot of other IEMs I have tested. I don't use public transportation so can't comment subway or bus ride, but was testing it in the basement where I have a "burn in" station with a few headphones blasting away in open air, and outside noise attenuation was pretty good.
Excellent, twister6. Thanks for responding. I was referring to Justinzanyo's comments earlier in this thread that "The fit is quite good. It's both comfortable and tight. They won't go loose when excercising. However, the isolation is a real issue." Very happy to hear you find it otherwise.