I didn't use the ToneWoodAmp with a PA, but I did run it through an amp, and the results were terrific, dry or wet.
Now, on to the effects and the un-amplified setup.
The range is impressive for such a modest and inexpensive unit. You have multiple types of reverb (three in all), delay, tremolo, a Leslie-speaker emulator, a wah effect, and my personal fave: distortion.
The intensity and volume of each effect can be turned up or down. And of course you can use these effects with an amp or a PA, or bypass them.
In an un-amplified setup, the ToneWoodAmp really does make an acoustic sound interesting. If you're performing a short set at a small, intimate venue or just playing for friends at home, the device allows you to really spice up the performance and avoid what can at times be that dreary, folk-song-y thing that acoustic players often struggle with.
I was able to go from light reverb on a fingerpicked number to dirty overdrive on a country rock tune with just a few quick spins of the ToneWoodAmp's knobs.