I recently got an Alber Metalstack guitar pedal (rebranded into RJ MS-400 Metalstack pedal in my country) for a cheap price of 1500 PHP or around 30 PHP. The material looks cheap, made out of metal but quite thin, so I definitely got what I paid for there.The sound is quite sharp depending on your settings, but while experimenting, it cannot give that fat distorted tone you might expect when you want to play genres such as Metalcore or Nu-Metal. The metalstack medal sounds much more closer to how Metallica sounded during their Kill Em All album. I tried to play a few Black Sabbath songs with it as well and it sounded decent, if I had to guess then I'd say this pedal focuses more on Classic Metal and Thrash Metal. It does not provide a good tone if you want to play punk or modern metal. I'd have to rate this pedal a 6/10.