I use this with my Fender HR Deville 60W which is loud as hell (and has no master volume), to tame it when at home. The LBA has done well its job as expected.
Pros:
Simple/cheap solution to a common problem
Cons:
- You could probably build this yourself with a potentiometer if you research a bit on the internet.
- The closer the potentiometer is to its 'zero' (min volumen) you'll clearly hear a degradation in your tone. There isn't any obvious degradation if you have it from half way onwards.
For me, if you're looking for a professional attenuator you need to prepare to spend 30 times more money. But if you're looking to solve your play-at-home-quieter issue, and you don't bother to build this yourself, the LBA is definitely worth the money.