What are some features of the society of Fahrenheit 451 that make it ideal or fair?

That is an interesting question, because it assumes that
their society is ideal, and tha it is fair.  One of the main points of this novel is
that it is impossible to be equal, fair or the same without some serious negative
repercussions not only to society, but also to one's well-being and happiness.  Sure,
everyone in Montag's society was equally entertained, equally mindless, and equally
accepting of life as it was.  But to get to that point, they had to give up
individuality, self-esteem (instead replacing it with an unhealthy focus on
appearances), freedom, intelligence, and the ability to think for oneself.  They stifled
creativity (unless in entertainment) and stereotyped those that DID think or stand out.
So, the society presented is not fair at all to people who want to use their own minds
to figure things out; in fact, it is downright dangerous to those types.  It's an ideal
place for people who don't want to think, but to simply be entertained and distracted
their entire lives.

Their society is only ideal if you want
a non-thinking society that is subconsciously miserable.  Their society is only ideal if
you want a society that foster true thought or freedom.  They do have ideal
entertainment, and as mentioned above, ideal response crews to medical emergencies. 
Also, they have the ideal police task force:  firemen who love their jobs and a
mechanical hound that almost always gets its target, with little effort or damage caused
in the meantime.  Their society is ideally positioned to maintain order and control
amongst its people--even if that does mean at the cost of happiness and
freedom.