I bought this because I wanted a thicker sounding proco rat sound. Having owned several iterations of the rat pedal in the past, I thought I would give this one a go. A good year or so down the line, I have decided that although this pedal has its uses it is overpriced.
Pros:
Classic rat tone, with the ability to dial in the tone more specifically. Switches are handy for cutting through the mix or thickening the sound of the dirt pedal. It works well with humbuckers or single coils.
Cons:
The price. A lot of people are opting for the cheaper clones you see around that can do the same thing.
Further Information:
This is great for thick 90's dirt tones. The rat voiced pedals are popular with grunge and indie bands, and is a useful in front of a clean amp. The Fat Rat is probably the best of the bunch, as it can cover most of the ground the other pedals are trying to achieve.