I bought this power lead to go with a Blackstar Fly3 desktop amp.
As it's the official cable from Blackstar it fits perfectly and is small and light enough not to take up too much space.
The only problem was that it's supplied with a Euro plug, however this is detachable from the transformer part of the cable so any length 'cloverleaf' suitable power cable can be used.
Despite me thinking it was awkward at first, it just meant I could use my laptop cable so one less to carry, plus depending on your needs, you can buy your own cable in whatever length you like.
The amp is silent (when you are not playing through it!) when using batteries, and, I'm happy to say, is silent when using the psu.
All in all it does its job well.