Too big, but it's very good

My only issue with this pedal is it's size, I can't put any more pedals in my pedalboard because of it, but it has every feature a delay pedal can have

This is quite possibly my favorite pedal of all time

I might get the Empress delay plugin at some point because it's so ridiculously powerful and configurable, but I have used the Line6 a ton and all of its modes sound so good they sometimes make me want to cry. Also, its built-in looping and triggering capabilities are all I've ever really needed for my guitar.

green box magic

Fantastic and now classic (?) delay modeler. If you neen clean crisp delays, its got you covered, modulated tails, that too. Its not the best thing out there but it covers SO much territory that its remained a part of my setup. Great on aux sends for dub sessions due to its hands on nature.

Complete and very useful

A pedal with endless possibilities! It is very well build. Some people complain about a volumedrop or about the switches. I don't experience any problems with it. I used the regular flashback of TC Electronic, but I was missing the opportunity of presets. Especially the looper is very useful. The pedal is quite big and maybe expensive for some, but for its sound and possibilities it isn't expensive at all.

Not knocked out

I know this is the most ubiquitous modeling delay on the planet, but I really do not like the DL4. I am glad they invented this 4 button format to be copied by companies like TC Electronic, but I just could never get into the sound of this thing when I owned it. It lasted maybe 2 weeks and went out the door! I did really dig that filtery delay model for creating wild portishead HPF repeats with increasing resonance and cutoff. This pedal also seemed to compromise my core guitar tone even when disengaged. I felt it compressed everything and cut my bandwidth some. I hate that. the tap worked well though, and that's good as were the silent switches. Not for me though. I apparently still have one of these but it seems to be broken. Color me surprised.

Mainstay

Hours of fun. From simple analogy delay to faithful reproductions of effects that are now veritable antiques & impossible to obtain -it can be a complex pedal but great to have this array of options in one stomp box thought it does take up a lot of real estate.
Have owned mine since 2000, no issues but I believe some people are not faring so well w/ older version of theirs.

One of the best and most complete delays. A classic.

A very complete and open ended delay. 3 presets. Tap tempo. I love the loop feature. I own two of this. I use them sometimes for looping and the other one for delay. or at times, I use both for loops. I love its play once, reverse and half speed function. You won't find that in a delay, except for the Strymon Timeline, but just to have the features this pedal offers talking about loops, you'll spend like twice the price of a DL4. The downside is that at times, I used to have troubles correctly powering it. (it uses supposedly 2000ma). Also, I haven't experienced it, but I've heard that sometimes the switches fail. They can be changed, but I guess it's normal. According to its use. To me, it's better than the Flashback and the DD20. Haven't tried the Eventide or Timeline.

Haven't even begun to imagine the possibilities

Many delay types to cover all your delaying needs! 3 pre-sets and built in tap tempo. Easier to recreate the delays of some of my favourite songs because it's used to widely.

Second hand is the way to go, they are coming down in price, and so definitely worth the buy.

Cons: Delay and Looper cannot be used at the same time. Footswitches CAN (hasn't happened with me) break

My personal wish: I would like to get it modded with new footswitches and LED's, double the memory presets to 6 and separating the loop function. All these mods can be done to it and they can all work together, it's just finding a modder in the UK & Ireland.

Versatile looping capabilities inspired by Howie Day

I bought this more for the looping capabilities than the delay (14 seconds of loop memory). Gotta admit, I saw Howie Day several years ago making heavy use of it and I loved the looping bits he did with it. It's just a very fun box, price isn't bad either for all you get.

EDIT: here it is in action http://youtu.be/LdqM8-gc4vo?t=6m2s

One of the best delays

i bought this pedal because many guitarist i hear use it and it did not disappointed. Very versatile and you can use in guitars, mics, samplers, etc