Pros: Isolation, comfort, rugged build, non fatiguing sound
Cons: Cable cracked after less than year
I'll address my the contradiction in my pros and cons first. The earpieces are solid and the strain reliefs are good on both the earpiece and the jack. The cable is thick and inspires confidence but something you won't know from just feeling it, is that it hardens and cracks after a while. Comfort is good and isolation is well above average.
They have a fairly pleasant non-fatiguing sound signature that doesn't stand out for any particular reason. Detail is average, bass is present but not prominent, it extends reasonably low but lacks punch. Midrange is free of any unpleasant colourations and the treble is slightly subdued and rolls off early. Normally this would be a huge negative for me but it works out to make the E2c well suited to most kinds of music and isn't sensitive to certain kinds of recordings.
Overall, a good all rounder apart from the cable issue. If you are after absolute sound quality and isolation, comfort and reliability come second, you can do better.