This is basically a simplified emulation of a Lexicon 224, classic digital reverb. You can get all types of sound, from a small room to endless huge hall sounds. So far, I have only used it on guitars, but I would be curious to test on some drum machines.
This pedal is pretty easy to use, but some people might need a bit of time to get used to the three decay frequency controls.
I personally use it for unrealistic reverb sounds.
One detail that could be important: it is mono only.
All and all a very cool pedal, good build, great sound.