TL;DR - don't watch it, it is of the same quality as a primary school play.
Premise: 2, a show about the Disney stories colliding in a secret world within ours. Could have been amazing if handled well but it just wasn't.
Acting quality: 1, starts moderate and declines rapidly
Plot: 0, wow... just awful
Effects: 1, out of date before they even began
Continuity: barely consistent, often character decision is based upon what the plot demands and not what makes sense from any perspective. The premise also means that the show feels entirely disjointed and incapable of deciding when the show is set
Casting: 0, the Rumplestiltskin character is the only one with a quality actor behind it
Hercules is clearly a straight-out-of-college white boy and meg is his a 16 year old white girl. In fact, almost every charactr is poorly cast.
Directing: 0, I just imagine the director stopping a scene to make sure the actors overact more.
Script: 0, people don't talk like this. Also, they seem to merge character motivations down to "parentao issues" for every character...
Makeup: 0, often uneven, sometimes textured in weird ways
In conclusion - how does this have a fresh rating on rotten tomatoes? In fact, how does it have a better rating than green lantern?
Just no.