Bought this unit as a part of my first pedal board. Delay is one of my favourite effects and unless you're looking for something really wacky, tit's really hard to go really wrong with it. To that end, this unit is a perfectly adequate digital delay.
It does what you would except for a delay to do and sounds great. You have three knobs: TIME, which is quickly copies of the original sound are played back, MIX controls how loud it is played back and REPEATS which controls how many copies of the original sound are played. Then you have switcher with 1/16, 1/8 and 3/8, which is basically just a modifier for TIME, meaning at 1/16 setting, repeats will still be coming fairly rapidly, whereas at 3/8 setting and TIME at zero, the echos will take their good long while.
Obviously more expensive units will have fancier features such as tap tempo and modulations for the echoes. However, if you're looking for a simple digital delay, there's no point in paying much more than this.