Cheap, but noisy poorly filtered power supply (despite the outputs coming from a box they do not have isolated earths=potential for serious noise). A single Boss PSA and a daisy chain will will do a better job so long as you don't overload it.

This is great way to power pedals, and very cheap. The product is made out of plastic but it is reliable and a good build quality. The only problem is the wires are too short, I have to my pedals extremely close to each other for it to reach. Other than that, great product :)