love how you can adjust gain and tone. the modulation sounds really nice as well. Can be difficult to control feedback as every change to tone, drive, time affects the repeats, but i like that about the rubberneck.
The delay has a great analog sound to it, just make sure it has enough power, or it can sound noisy.
the only negative thing i could say would be of the build. a little plasticy and the footswitches can be a bit annoying. but not really a big deal when you have such a great sounding delay.