Metal distortion?

I was looking at a couple different brands of metal distortion and i came acoss one thats pretty cheap i was wondering if its any good heres the link:

http://www.guitarcenter.com/DigiTech-DDM-Death-Metal-Distortion-Guitar-Effects-Pedal-102670247-i1124379.gc?source=4WWRWXGB

its the digitech ddm

Is it as good as the BOSS metal core or metal zone?