This couldn't be any easier. 9 volts centre negative power supply. Plug it in and you get 9 volts! Solid looking and feeling; although the cable looks thin I reckon it could take some trampling around the stage before it wears out. It looks sturdy when compared with other similar products. If you just want one pedal juiced this is a good option but if you need power for a board you will need something else.
Solid and reliable if Boss have anything to do with it, I would not hesitate to buy again. I give it four stars as the fifth comes for reliability over time and it's too soon to say as it has not been gigged yet.