Definitely a great earphone. For comparison sake I also own the LCD-2R2 and the Etymotic MC3.
 
Sound
 
These are very neutral and bordering on bass light. The bass is definitely there and it is very detailed but it lacks the punch due to the small driver size and the limited amount of air it can move. They will definitely be for someone who likes an analytic sound rather than a colored sound.
 
The mids and highs are very detailed. The sound is not tiring but I would not say it is laid back.
 
There is definitely some microphonics.
 
Fit
 
With universal IEMs everyone will have a different experience. However, I absolutely love the small triple flanges. They seal as well as the large ones for me but are very comfortable. I can often forget I have them in my ears. Although it must be said that it took a few days before I became accustomed to the fit. They definitely go quite deep into the ear.
 
The drivers themselves are very light.
 
The cable is quite stiff, and slightly thin. It seems sturdy though and apparently is teflon reinforced. The stiff nature of the cable makes it somewhat difficult to wear over the ear.
 
Aesthetics
 
I quite like the classic look of the Etymotic driver enclosure. It has a metallic look paint on the plastic housings. 
 
They are definitely worth the money.

These were my first over ear headphone. At the time I went to a retail store and tested the D2000, D5000 and the D1100. Due to price considerations I went away with the D1100.
 
Build Quality
 
The headphone in terms of worksmanship is commensurate with the price. The back of the cups are some kind of alloy while the rest of it is mostly plastic construction. This helps keep the headphone light. The ear-pads are reasonably soft and there were no manufacturing faults.
 
Where I have to fault the design is the use of plastic in the arms that secure the cups. Over the course of about 4 months of moderate usage the arms started to crack and eventually one of them broke. I was able to super glue it and it has held up for the last month or so without re-breaking. In the interest of full disclosure I have a fairly large head.
 
Those who would buy these headphones should take care to take them off by not pulling out on the cups but rather pulling out at the pivot to reduce the stress on the thinner plastic arms.
 
Comfort
 
These are very light and there is very little clamping force. This combined with reasonably soft pads makes for a very light listening experience. One can often forget that these are on his or her head.
 
Since these are closed back and use some kind of synthetic leather there is very little ventilation for your ears and they may get hot after a few hours of listening.
 
Sound
 
Frames of reference are:
 
Etymotic MC5
HiFiMAN HE-400
 
These are definitely bass heavy and this bass does leak through into the mids. While there is a lot of bass I am left wanting a little more clarity. 
 
The mids are well detailed to my ear if a little recessed.
 
The treble is a little rolled off compared to the HE-400. 
 
Overall these are a warm can that will appeal to those who love their bass.
 
Soundstage is fairly good. I am not one who experience a lot of depth to music but I can say the separation between instruments is good but I would not say it is easy to pinpoint where each sound is coming from in 3D space.
 
It is very easy to drive and you will not have trouble with it out of a portable music player without an amp. This combined with its portability is a big plus for people who would want to use these on the train or during commutes.