Don't worry, not going to offer any more self defense classes. 
Anyway, I like to peruse the reviews and look at the various providers reviews linked in their showcases and I noticed a few things:
Some providers have a stellar reputation and 8-9 out of 10 yes reviews.  Even then, there's almost (please note that I said almost) always a no or two in the bunch.
So it got me to thinking:  How much stock do you fellow fucktards put into a no?
I figure that providers have bad days just like the rest of us, so that could have an impact on service.  Also, a fucktard could show up and be a real disappointment to the provider, thus making her want to "just get it over with" and understandably so. 
To be clear: I am not calling out any provider in particular.  I figure if they've been around long enough they've heard all kinds of things about themselves.
So for the men: How much stock do put into a no review? Why?
For the ladies: How much does the fucktard's appearance, hygiene, or attitude impact your service level?