An honest review...
The first few seasons of this web show is pretty weak but it does get better as the show progresses. I recommend watching the show from the sixth season onwards, which would start at episode 101.
Some may say the Fanfic Critic is a rip off of the Nostalgia Critic but I can assure you she isn't. Yeah, her catch phrase isn't very original but I've seen a lot of other reviewers do the same thing. Her second outfit looked like Doug's but not exact. As for her latest outfit, it has its own unique look.
One great thing about the show would have to be the storyline involving the main character and her cousin. This storyline really starts up with Episode 55. Don't want to spoil anything but it gets pretty serious as the show progresses. There is still some humor, though...makes me wonder if Fanfic Critic is a fan of Joss Whedon?
To rap this up, this show is pretty decent and gets better with each season. The improv is impressive at times, though it can be weak in earlier seasons. If you like fanfiction or just like to see girls in their mid-twenties going nuts after reading something foul, then this is the show for you.