Summary: ...got everything else wrong. Take this mini-review with a grain of salt because YMMV with these IEMs. You may even get a great fit with comfort, but I didn't.
Summary: First off let me preface by stating that I bought these on a whim. I had read many things about Etymotic's penchant for accurate reproduction.
Pros: Amazing isolation, Transparent sounding, Extremely accurate, High degree of imaging in mid and treble
Cons: Bass is uninspiring, Product out of the box is a poor representation of the device -- burn in absolutely required.
Summary: Using the buds with computer , ipod and other portable devices. Sound is good, very detailed, good low end when properly inserted. Frequency balanced , very present.
Pros: Compact, Good isolation, Good Value, Great Sound, Lightweight
Summary: I use these on the subway to work. Great noise blocking over the full spectrum (not just bass), and I can listen at a much lower volume and still hear everything.
Summary: Etymotic Research's HF5 in-ear earphones worked well on a transpacific flight. Seventy-five percent of engine noise was cancelled and most of speech was nicely muted.
Summary: I recently came into the market for an upscale set of canalphones. The market is now flooded with options most notably from Shure and Ultimate Ear.