I use it at home with my Peavey 6505 120W + Engl 4x12 Pro.
I needed this, becasue sometime i have to lower the volume on my rig.
My expactations were not really high, becasue You can read everywhere how attenuators affect the sound of your amp, and how bad they are. I can say i was really suprised.
Compared to the natural sound of my amp i can barely tell the difference (Except the volume ofcourse).
I usually use it on 50% or 75% to attenuate the volume for normal room use, but using on 18% give me a surrealistic feel, becasue i never had a chance to play my amp monster late night. Now its not a problem anymore. At 18% the sound gets a little bit muddy (But still enjoyable) but im sure about its becasue the signal at this level is too low for my 4x12.
The construction is perfect for me. Simple, strong and straightforward. I expected it to heat up after a while, but i never noticed it.
The bypass function also working fine and it makes easy to switch between the amp original and the attenuated volume.
So, I can only recommend it if you need to lower the volume on your rig.