I'm using this pedal on a bass guitar, so please keep that in mind as you read the review.
Delay models:
Some very pleasant delay sounds to play with, I particularly enjoy the first 3 models (2290 for a super clean digi delay, "analogue" for going crazy with the feedback options, and "tape" for squeezing out beautiful mellow reverb-like sounds).
I don't really care for the other models, I think they are fund to play with but not really useful on a bass, although I imagine for a guitar player that would be a different story (although the "crystal" is crazy cool as an "organ" up-octave sound when delay is set to zero, too bad you can't mute the input sound at the same time).
Still, the first three delay models already make the pedal really worthwile for me.
I would really prefer to have some more "toneprint" slots instead of having the "reverse", "dynamic" or "mod" delays for example, but that is really a personal thing, and considering this is not a bass specific pedal, I can't fault TC for that.
Toneprint:
If you are familiar with TC Electronic's "tone print" line of pedals, the "feature packed" part of the review title should come as no surprise:
the amount of crazy effects you can squeeze out of this pedal's chip using the toneprint feature in the custom slotgoes way beyond a "delay pedal": for example, you can turn the pedal into a pretty decent chorus, tweak a huge number of parameters of custom delays, including assigning custom functions to the pedal controls, or get some crazy envelope/modulation effects out of it.
There are for sure a lot of limitations in what you can customise, but still, I think TC is already giving us way more than what you would normally expect from a digital effects company.
Mash:
The "mash" feature is interesting (you can use the pressure sensitive button like if it were a -limited- expression pedal), and really opens up some options, although I ended up switching the pedal to "disable mash", so I could use the "tap tempo" feature for the button instead.I think you can have the best of both worlds if you get an extra footswitch, but in my case I didn't care that much about "mash" to justify that investment .
Looper:
The looper is pretty basic, I guess you can use it for practice, but not really practical besides that since there is no "undo" feature. It is a very cool addition for that purpose though, if you don't already own a looper.
Summary:
So, overall, I think this is a great value for the price, considering it covers so much ground.
Is it the best sounding delay pedal? No, but I think you would need to spend at least twice the price of this pedal to get there, and that would be for a single sound.
I am still finding new things to like about this pedal every day, so a big thumbs up on this one :)