I agree with Page, but i still don't like the sound of the Metal Zone. I grew up on Metallica, Anthrax, Megadeth, Pantera, Fear Factory...all the heavy compressed distortion bands. I liked that sound, and back then when I listened to it all the time the metal zone was the ****. Now I don listen to that music anymore, and I play in a band where you fight for tone frequencies and that pedal sounds like **** now. I guess it sucks for blues and rock players, but for shred heads and metal heads (especially those playing by themselves at home), thats the sound they like and want.
I still have my DS1 floating around somewhere and it is a good distortion pedal, but mine's O.G. and it has that pause when you switch it, so for that it kinda sucks.
For a far worse pedal, check out that DOD death metal pedal. Bad. Very bad.