Feature:
Basic and complete set of features for delay. I'd give a 10, but competition is added a modulated delay which seems a very natural and useful extension.

Quality:
seems sturdy. The on off switch is very quiet. I found it to be very picky on proper power source. Slightly used battery or aging power supplies greatly affected the noise of the pedal. Not a problem but may require that quality power supply/battery is used. The rubber that holds the bottom plate in is a little tough to get on, but after 10 years of use will it still be pliable and work.

Sound:
The sound of the delay is very natural and pleasing. It reminded me of the old Boss DM-2, but with much longer delay times. The self oscilating feature was cool but seemed to loose sound quality instead of just infinite repeat, still nice. The way the level knob adds 0-100% of delay signal to the constant 100% dry signal and the way the the feedback allows new signal to come in even at close to 100% make it very easy to dial in nice settings.