using the y split, i can get them to stay in place much better wearing them up. its an odd feeling... i feel like i have great seal and comfort, but they dont take a lot of fuss to put in and pulll out. i was thinking maybe the seal isnt that good, but even if i press gently on the monitor, the sound doesnt change so the seal is good. i feel like if i turned my head to look at something quickly, they would fall out. using the bi flange. coming from customs and foam tipped W4s, these feel a lot less stable in the ear. sound is wonderful tho. full, clear, and fun!