Feature:
Very easy to set delay times from 0-2.3 seconds. You can blend analog sounds with digital sounds. You can control the modulation on the delay echoes. And of course, you can control the delay feedback and wet/dry mix. Allows for traditional delay, dynamic delay, reverse delay (SICK), ping-pong delay, pan delay (if you have a stereo setup), and slap-back delay. You can also do a musical tap tempo, where you set the delay time by playing your guitar, not trying to stomp on the thing at the exact right moments. There are 9 presets that are worthless, but you can store your own. Comes with the AC adapter.

Quality:
Seems to be built like a tank. It's a pretty heavy unit and will definitely take up some board space if you place it there. Since I run it in the effects loop, I have it sitting on top of the amp.

Value:
This pedal is expensive, but that doesn't mean it's not a great value. I think it's easily on par with the Eventide Timefactor, which is even more expensive. The Boss DDs are cheaper for a reason. You can do what I did and mess around buying DD-3s and DD-6s or just save a lot of time and money and buy this.

Desirability:
This thing looks pretty sweet all lit up in red. The delay time is shown in big red numbers and the tempo light flashes, so I guess that's pretty cool.

Sound:
Unbelievable. I run this in the effects loop of a Mesa Mark IV and it just sounds incredible. Accurately reproduces analog delay sounds and even lets you blend them with digital sounds. I've owned the DD-3 and the DD-6 and they come nowhere near the quality of this pedal. Since I use the amp for all of my distorted sounds, I have to run the pedal through the effects loop to avoid changes in delay feedback based on volume. With the DD-3 and DD-6, I always got a horrible distorted delay sound whenever the clean channel was on (the output from the pedal may have been too high and there's no way to fix it). Not with this unit. If the output is too high, you just do a simple calibration and you are set.

Ease of Use:
Very intuitive interface. Play sround with it for 5 minutes and you'll know what everything does.

Support:
TC makes a lot of great products and the warranty is standard.

Overall:
Finally, one piece of gear that I can stop searching for. This thing sounds great and I would replace it in an instant if it were lost or stolen.