All of my comments on restaurants are based on my personal tastes and preferences, but I have decided to set a rating scale the restaurant review section of this website and it goes as follows from low to high:

I would rather go hungry - Food is a rather huge part of my entire life. For me to rather not eat anything then eat at this establishment says something.  
Fine -This comes from my husband asking me questions about what I think of a dish in front of the person who made it.  If I don't care much for it, but deem it edible, and he asks what I think I will say "it's fine."
Outstanding - My mother has a tendency to exaggerate things, to the point where I think almost every time I have had dinner with her in the past 5 years each meal has had some element that has been "outstanding," because of this I feel most people should translate this rating to mean average.
Phenomenal - This is another mamma original, this is the term she uses when something is better then outstanding.  I know what you are thinking -  What could be higher then outstanding?  Well phenomenal is that, at least in my family. Translation - above average.
Life Changing - This is the term I use for the best in class, it might not be the best in the world, but in my opinion it has the best of something in Austin.