I first tried it out of curiosity in a shop. Love at first try. Everything - you get full blown fuzz, but also note clarity/focus. I couldn't get it out of my mk d, so, there, i bought it.
I only tried it on guitar, but for guitar also, it's a dream. All features really change how it feels/acts with yoj. I would recommend this not just to fuzz lovers, but also for people who don't know how they feel about fuzz, and want to experience it.