maybe I have a peculiar shaped ear , but it seem these earbud can fall out quite easily . I have try all the different silicone size and it still do not fix the issue . especially when I be eat , the chew movement displace the earbud very quickly . another note , and this maybe be true of all in-ear earbud , be any movement to the wire will be translate to noise in you ear . I can hear all the rustle as I move around . other than these issue , sound quality be good compare to my stock ipod one .