Mooer ShimVerb is a very unique pedal. It is very small, but has many features.
So, i have this little thing in my board over a year, and some of things I have found out are:
+: It is very usable in many different pats. For instance, i like to use it to make my tone wider. I crank up decay to 3/4 and switch to shimmer, but I leave volume low, not to lose my guitar tone so much, and then it gives me the kind of background, like pianos and electro. It is very usable to get "space" kind of sounds. The reverb on this pedal is common, I use it rare, because shimmer mode for me is better in playing.
-: The most anyoing thing is the switch. When I play my guitar and tur it on, it is like the sound makes a click. There is a gap.
When volume is cranked up like 2/3 the sound of guitar fades and makes a feeling, that you have a very big signal loss in this pedal (shimmer)
And the shimmer adds only 5th position. This could be awesome and bad at the same time. I find it useful.