How bad is this one?

[Dr.Mavashi]

I mean its pretty cheap, will it totally destroy the tone so that whatever I dial those settings would be completely useless when I crank up ?
http://www.musiciansfriend.com/product/ADesigns-ATTY-Volume-Attenuator?sku=189900

 

[Reckless Abandon]

Re: How bad is this one?

It may not sound the best with a guitar