I bought this to go with my Blackstar Fly 3 desktop amp.
I bought it as I was planning on using the fly 3 as a speaker for my iPod and laptop so reasoned that a second speaker would give me a stero spread.
The volume certainly increases compared to using the amp on its own, and it sounds good when using it as a music speaker. I found it was very good when using it with my laptop watching movies, certainly better than the computer speakers.
The only issue, just like the amp, is that it's quite a bulky item, and putting it in a bag along with the fly 3 amp takes up a lot of space.
It's built well, and survived a month of being shoved in and out of bags, indoors and outdoors it hasn't fallen apart.
The method of cable storage is quirky but I would rather have had a port to be able to connect a 4.5mm jack between this and the amp so you could choose you own length rather than that specified by Blackstar. Long term, it will be the cable that lets this speaker down as you can't replace it yourself.