It takes time to get to know this device, after only two weeks of use I still have not tested all of it. I keep going back to settings I like and tweak them or combine them with other pedals for extra effect. Most difficult to tune is the build-in fuzz, but fuzz is very prone to personal taste and preference so ymmv. I ended up placing my own DOD Carcosa fuzz in the loop, which in my setup created more usable sounds. To say it's 'just' a swell/volume pedal does not do it justice, especially the way you can shape the envelope makes this a lot more diverse and creative. Some of the settings create strange behavior, but you could also see it as a feature, which sometimes adds to what you build and sometimes you just have to restart. So this thing has a lot of useful sounds, a lot of experimenting and for the price it's hard to find anything more fun to play with. Saving presets is also a nice feature, when you want to recreate settings with one or two taps, the expression features I have to test, but they look flexible enough and can be used for different knobs and settings.