This pedal is clearly equipped with a great amount of knobs, which might scare unaware people, but after you get the handle of it, the Jackhammer JH-1 will definitely show its real power as a versatile OD guitar pedal that can cover from a Bluesy Rock to Heavy Metal. Its Distortion mode adds even more gain to the recipe, but with a perceptible downside; it comes with a lot of Bass. Almost every setting you try for this mode will require the Bass to be set 9 O'Clock or lower, unless you like having a Distortion effect with almost no definition. It's an excellent pedal for intermediary players, since it will take time to learn how to tweak the Countour/Freq knobs. For beginners I would recommend getting a conventional 3-knobs OD pedal (Volume, Tone and Gain).
I´m glad to have this pedal. You have overdrive and distortion in one pedal, and the overdrive is incredible. In the other hand, the distortion has frequence and contour control, which allows you to change your distortion tone however you like. I have some problems to equalize it but it´s still being a good pedal.