Ive never worn Clarks before, and am SO glad I tried them! whether to pause/resume music when an incoming call comes in. +Its ability to function as a powerbank is a PLUS. In these situations, the Sennheisers cancel about 40% of the low-frequency background noise (tyre roll, engine revs, turbine whirl) and maybe 20% of the high frequency noise (speech, car horns, incessant announcements at airport gates). Just a bit of a pain to change out belts when I want to. As for the iphone app, its solid. We use it every night with the radio station it came with in the app, it adds to the value. Anything more and you may need to buy a 2nd rack, which I wont hesitate to do if I get any larger weights. Hatte mich ja für den Tröger entschieden da er preiswert war. Lasted 2 days.