Voodoo Lab has been in the pedal powering business for quite some time now, and still delivers.
What I especially like about their product line is that every output starts from 9V, but can still deliver increased voltage - either through the dip switches, or by combining outputs through their special cables.
This makes that every output has a potential usage. While it may seem convenient from other manufacturers to provide 18V outputs, such outputs might be wasted if you only have 9V effects on your board.
The unit is perfectly silent and, as can be expected, each and every output is isolated.
Lastly, their customer support is excellent. Their response to my inquiry was fast, clear, friendly and with a sincere undertone to really want to help me along with my question.
I purchased this unit only a short while ago, but I've been using a Pedal Power 2 Plus for years now, without any issue.
Highly recommended!