I needed delay pedal that had memory slots, the previously used delay pedal with just a tap function could not fill my needs, but Boss DD-200 does! The old delay was nice, but one of my band's repertoire has some songs that need exact BPM for delay and these songs might come up in a set suddenly, just when the singer decides to sing them and I have no time to tap it in correctly. And I messed up quite a lot of these songs' intros. But now Boss DD-200 having 4 memory slots is enough for me, especially in a relatively small dimensions on pedalboard.
DD-200 sounds good, it has many modes and they are all tweakable to great extent, anything you can think of, you can tweak it. I usually stick to tape or analog modes and the possibilities are sure too complicated for a beginner, for instance you can adjust different tape heads which play the echo back, how worn the tape is, wobble etc.
Almost only reason why I gave it total of 4 stars, is because of re-editing the sounds that are in memory slots. The problem that I pumped into is when I want to tweak something in memory slot's sound. For example, if delay sound's wet/dry mix in too small or high (the sound feels different playing with the band or while programming them alone), there's nowhere to see what number value it had previously. When I touch the dry/wet knob, it instantly changes the parameter to knobs position. How could I possibly know if it was previously 21 or 22 or 34? Sometimes changing it from e.g. 15 to 17 makes already important difference. Sure, you'll get it right at the end, but it takes much more time than needed. Some other companies have solved this issue in digital pedals by indicating the original value with blinking etc.
And I guess it's easy to be done via USB, but should I have my computer in soundcheck?
But everything else, I'm very happy with it, MIDI connection to control it by remote switching system, great quality jacks, sturdy casing. Memory slots and small size are the reasons why I chose DD-200 over Strymon, TC Electronic, EH or other brands. In that perspective there is no competition (at least in 2019-2020 season).