I bought this to use with my Amplifi75 and it's wonderful. It works exactly as advertised and is surprisingly stable (it's also quite heavy so it doesn't move).
One thing though that's not advertised as clearly as it could be is the multi-coloured LED ring functionality only works with certain amps (like the Firehawk1500). This isn't a flaw so it definitely gets 5 stars, but sites could do a bit of a better job highlighting this at the beginning so customers aren't misled.
Thomann has done a great job in this regard in changing all the displayed pictures to show only the red LED's - so that's nice.