I have used this for a few years. Never had any problems, never buzzing, never hissing. The size is quite nice.
The build-quality is really good. The power-chord does not feel cheap. The metal-casing makes it really durable and strong. Nice rubber-feet at the bottom. Enough wires included: 5 x 60 cm / 5x 30 cm / 1 x Y / 1x daisy chain. Really sturdy and a quality product.
If you want this product with the same quality, reliability and features, but a different brand.. I bet its not possible under 80-90 euro.
The PowerPlant Junior seems to be a copy of the T-Rex Fuel Tank Junior, so that could be an option. (available at thomann) from what i read, the other power-supplies under 85 euro have less quality and more problems. (Don't buy Mooer or palmer... )
Really, with this build-quality and for this money, no body should complain about anything, it's perfect for the money but i wanted to be honest about that annoyed me a tiny bit:
When using this on a small pedalboard, the only small downside to this power-supply is the placement of the power-chord input. Many more expensive power-supplies from other brands have this problem too. I want to make people aware of it; design your pedalboard first on paper (or in your head) and figure where you want the power-supply to be. (if you don't care about looks, durability and usage; then this is not a problem for you, i know many people don't care.. haha. i though, want to have everything look tight/nice and wired and placed in a really efficient way)
The power-chord placement be solved by turning the powerplant 180 degrees, but then the 9v outputs could be facing towards the 'audience'. This makes it harder to change 9v outputs and a it's tiny bit less appealing/attractive on your pedalboard. Another option is to have the power-chord input facing you, but with smaller pedalboards this could result in bending the power-chord too much, this could result in internal power-chord-wire damage. (you don't want that when preforming on a stage)
Right now i am using a really small pedalboard with a TrueTone-1-Spot adapter because this saves me room on my house-made custom tiny pedal board. (space for 2-3 pedals) and also no noise what so ever.
If you get annoyed by the power-chord input placement, you should consider buying the Harley Benton PowerPlant ISO-5 Pro. This power-supply has a block with 9v inputs and connects to an Adapter. The adapter input is placed at the same face as the 9v inputs and the adapter-chord is not a struggle to run in/over your pedal board. Besides that, the Harley Benton PowerPlant ISO-5 Pro also looks beautiful with that brushed metal look.
The only reason i give this product 4 stars, is to make a point about designing your pedalboard first and after that buying the power-supply.
Conclusion: Harley Benton makes really good products and they all have their own purpose :-) design your pedalboard on paper / scratch first and decide what product works best for your pedalboard / usage. :-)