Another brony here, 21 years old, got into this show a few weeks ago. I've got to say, this is a fine piece of entertainment. I think kids would love it, not that I’m an expert in that field, but even on its own merits it’s a good show. The jokes are genuinely clever, often hilarious, and have a great way of catching you off guard (not because they are vulgar or anything). It’s refreshing to see a show that uses genuine wit rather than using vulgarity as a comedy-crutch. The characters are well developed and actually behave much like real people, especially for a children’s show. The plots are generally interesting too, I’m often wondering how the situations will be resolved.
I’m kind of surprised the show is marketed towards the 3-6 demographic however. It doesn’t quite feel like that’s who it is intended for. I’ll go into more detail below:
The lessons ring true 95% of the time. The show packs genuine wisdom. However, a lot of them seem too advanced for a four year, who is probably just learning the basics of right and wrong. For example, not being overly critical of things your friends give to you, to not be afraid to demonstrate your talents in front of friends, to use your friends to turn misfortune into a good laugh, or being willing to accept the help of others seems a bit advanced for Morality 101. Not that it’s Morality 401, either. Also, while the lessons are generally spot on, I feel Faust doesn’t really do a great job of demonstrating them, because they are either presented in contexts too fantastical to relate to real-life, or simply seem to work out instantenously, without really showing the process that leads to the end result, like how talking with your friends about a horrible night could evolve into a very entertain conversation. She sort of expects kids to take her word.
The show is pretty darn clean (I still can’t get used to villains self-censoring with terms like “good gracious”). The most scandalous joke in all of season 1 involves one character joking about the punch being “Spiked” (yes, capital ‘S’, you’ll get it in context). However, I don’t know that it’s quite STERILE-clean. One episode involves a character using generous amounts of fake blood to make it look like an owl had attacked a mouse, which might be a bit disturbing to preschoolers. There are also some scenes in the first two episodes of the first two season that I think could scare a three year old. Characters are occasionally casually snarky towards each other and occassionally conduct behavior that would come off as rude in real rather than cartoon setting (like one character angrily saying "No thanks" and throwing a book across the room when a friend offers it to her), and remembering myself at three, I know that can have negative influence on preschoolers, who think that if the cartoon on television isn’t offended by the behavior, no one else will be. So I don’t quite think this show is appropriate for ALL ages.
As for watching this show if you don’t have kids…I recommend you don’t judge it after watching a single episode, let me just say that. Watching three or four should give you a good idea of what to expect from this show. And don’t start with Episode 1. That struck me as pretty standard kid-TV. Episodes vary in quality a lot, at least in the first season. Some episodes seem like standard kiddy-fare, others are pure awesomeness on their own merits. Most fall somewhere in between, but lean towards the latter end of the scale and the overwhelming majority are worth watching. If you have body hair and you want to watch this show solely for your own entertainment, I recommend starting Episode 9, 15, 21, 24, or 25. These are hilarious and well written, the best of the first season.
Oh, and about the objectional content. I've google-images-searched things like "Twilight Sparkle" and "Rainbow Dash" a few times and never ran into this problem. I think if you keep "safe search" on you should be alright. And pretty much ANY content has potential to be turned into something objectionable on youtube.