This pedal is "advertised" as a RAT copy/clone. I bought one so that I could have that RAT sound with the addition of the options on the switch. However, after placing it on my board and comparing against my own RAT with a pedal switcher, it was clear that they are not the same. Whilst we are in the same ballpark, the EQ is not the same and it didn't have the same "chewy crunchiness" that the RAT had.
However, if you are not specifically looking for a RAT clone/replacement, then this may work for you. It starts with a crunchy overdrive and goes up to silicon fuzz. The modes are good and it gives you a good boost capability that the original RAT does not have.