my 13 year old son has some of these effects....he has bought simply based on their price....he uses his own allowance money...
he wanted to experiment with different pedal sounds and figured the was the cheapest and best way to do it to see what he likes and does not like...
they seem to sound and work fine....though i can tell you the enclosures are some form of plastic or nylon
no idea if they are buffered or true bypass
you can see he has the Hell Babe Wah, the Chorus, and the DI
again they all seem to work fine...especially for the money