The best way I can describe the show to others and gush at the same time is:demoman_chaos said:What is the appeal of the show? Is it a comedy? What exactly makes it watchable?
Take Sienfeld or Azumanga Daioh, make everyone ponies, and crank the silliness factor past eleven and all the way to thirty.
They are realistically flawed characters, NOT one note marketing devices.
The ponies themselves snark at anything overly girly or distractingly whimsical. The show is aware that parents will be watching so the snark makes it a billion times more tolerable and extremely funny at the same time.
No female main character falls into a typical girl show stereotype and are on their way to become new archetypes themselves.
Musical numbers are used sparingly and are either used for comedic or dramatic effect, not to fill a "girly show cliche" quota.
The morals are taken from the episodes after they are written and not written to showcase the "lesson of the week."
A few hiccups aside, the animation is gorgeous.