The on ear has terrible isolation so in a noisy environment the extra bass will probably not make a difference. I tried them in a noisey store. I didn't care much for their sound, IMO too much bass, not enough mids and the treble had a ramped up response. I'm not a fan of either a V or U shaped FR. Some call that fun, not me. I don't care of what that does to vocals or the sound of cymbals, etc. If only the bass was pushed up a tad, that would be better for my tastes. I like extra bass but not when the rest of the FR is messed with.
i haven't seen a pair up here in canada ( but i heard that isolation is subpar), so even that extra bass wouldn't really do much i would think.
maybe their really meant to be used while walking around a decently busy street (rather than heavy commuting, trains/planes/subway).
plus their target population isn't really "audiophiles" per say, it seems like sennheiser is trying to take a bite out of beat's market. (which is to be expected that probably 8/10 people that use earphones/ headphones are either apple or beats in the general public
but that said i see people using earpods on subways... i dunno how they do that... i've never done that.... but i did use some of those sony fontopia earbuds in high school so i know the lack of isolation
sorry went off track there