If you are looking for a power supply around this pricepoint, I'd say this is 10x better than the one-spot as it simply reduces noise so much already.
After using it for more than a year now, it has not let me down yet. I wouldn't say the noise is 'zero', but it's significantly less than the onespot I used before this. Also, it neatly fits on the underside of the bigger 'spaceship' pedalboard that Thomann also sells. I'd the say the biggest downside is there's 'only' five outputs, but I highly recommend it for smaller pedalboards or anything alike.