NUX Time Core is a really cheappp one with a couple of interesting features (reverse delay, stereo ping poing/modulated etc, trails or true bypass options, that thing i can't think of the name of where - when you change the speed - the warped pitch-shifted sound is incorporated into the next repeat, and a verrrry basic loop function which alas can't be combined with the delays.) Warning tho that in my experience (of 2 different units) it will crash and produce no sound if things are hot-plugged in sometimes. Just unplug and re-connect the DC power after setting up your pedal chain tho and all should be well.