As for the original question. It totally works for that. Too bad when I had mine for many years,.. I never did that much. I was too easily distracted by how you could take any sort of speech/dialogue sample.. and put it in a totally different context. Like turning a bold statement into a curious question.
Another great use for it is percussive sounds... like sampling a bottle and all across the keyboard you have a great mallet style sound.
It does sound very very digital when you push it too far (time,pitch,shuffle).. but sometimes in a pleasing way... sometime not,.. but usually when it sounds bad it's because you prolly had a bad idea in the first place.
And it doesn't have a filter, which can be annoying,.. but it's more of a finishing touch/random inspiration machine. Also, there is a filter in the effects section. The analog/space delays btw are amazing. I prefer it over the RE-20 and the RE-201. Hoping the Boss VF-1 I recently purchased to replace it.. sounds as good.