I just got mine after waiting nearly a month and to be honest, I don't think anything else can beat it for $20 (well I wouldn't know, there are so many choices out there).
These are not giant killers, but once you get a good seal (this is IMPERATIVE), they sound pretty good, and for $20 they sound amazing. They are somewhat airy sounding (not exactly a big soundstage but they are not "in-your-head" sounding) while retaining generally smooth mids and the bass on Clear Bass mode, although not extremely well defined, has strong impact. The bass on Deep Bass seems to extend maybe a tad lower, but it seems to cloud the upper frequencies more.
One thing I'm confused about is the configurations for Deep Bass and Clear Bass. It's probably terminology, but I initially expected Deep Bass to have more bass impact than Clear Bass, but it seems maybe that they mean Deep Bass by actual depth of bass and Clear Bass allows the bass to come through. I'm not sure if this was addressed already in this thread.
Without a good seal, they are pretty bad and tinny sounding. I could not attain a good seal with any of the sizes of the silicone tips, but I tried the Shure black olive foamie clone pair that they included and it worked out for me. YMMV.