Summary: I've had this headphones for a few weeks, and they work very well, they deliver very good quality on the music (although I am no expert).
The only minor drawback is the carrying case, which is too big to carry on my pocket, and that makes me not take them around on the bus commute, which is one of the things I wanted them for.
Summary: Soud quality of mic and earphones is excellent and outside sound isolation is great. Nice carrying case and comes with a wide selection of sizes and types of plugs for any ear. Although they are very sturdy, they are a bit bulky and the volume control (which is very sensitive) and mute button are very near the phone plug. Better design would probably be to merge the microphone with the volume/mute control and put it at the join of the two earphone wires.
Summary: Very nice set of earphones, and some of the most comfortable ones I've worn. I've used the black flexible rubber set of earphones over a nearly 10-hour airplane flight from Rhode Island to California, and they were great at keeping out the airplane noise and the screams of toddlers.
The volume controls are bulky, however, and the wires are rather thick.
Summary: The Shure line of earbuds and headphones is top quality. I own several pairs of Shure earbuds, and I have always been very happy with the range of frequencies and crispness of the sound produced. One criticism of Shure buds that I have seen points to the apparent lack of strong bass, but with the i2cT, the earpiece is large and bass conductivity is strong if you wear the buds properly (you have to get them snugly into your ear).