I like Gwyneth, I thought she was a nice thought and written character. She did had her up and downs qualities, but that is what I like about her. Gwen is "dory" throughout the story, which we don't get to see much in YA lit. Characters usually change for the development of the story, for it was different from other series (well at least that's what I think). I like that Gwen is who is she. Reading from her point of view was interesting.
It's a fast read, so it your looking for a quick novel, then I recommend Ruby Red.