It's cheap, it adds some electronic interferences but it does the job. At first I was bit shocked by the noise and thought it was unusable. I paused its use for weeks and tried it again, was okay, the noise had disappeared. Next day it came back and stayed... So it does power multiple pedals, but it adds an annoying background noise most of the time.
This product is a bit contradictory. Because of how cheap it is you'd think it's for beginners but what beginner needs to power 5 pedals simultaneously? I also thought having only one cable would make my life easier because it would create less knots, but the flip side is the space between power pins is so short it creates another problem: if you have one large pedal (with 2 footswitches side by side for example) you may have to skip at least one power pin to connect everything together.
Also, if you only use 2-3 pedals you'll have a few power pins hanging out loaded with power. It's only 9v and theoretically the live pin is out of reach, but still, it doesn't feel super safe.
Anyway, I don't regret buying it, considering how cheap it is, there isn't much to expect. But I think it would've been wiser to save up a little more and buy something more reliable.