Sometimes I look at my to read list and can't remember even having heard of the books in there (I'm pretty sure weird gremlins put stuff on there). This was one of those, but I decided to read it anyway, and I'm really glad that I did. If you like Percy Jackson, or Hex Hall, you should definitely give this series a try.
Full disclosure, I'm not actually a huge fan of the Percy Jackson books, so I was a little wary of this one at first. Once I started reading though, I didn't want to stop (which led to some really unfortunate homework procrastination, whoops).
I really liked Gwen. She was believable as a character, and if she was real I would totally want to hang out with her. I'm also really pleased that they took the "bitchy popular girl" and had her actually be a totally cool person. Basically, a lot of books in this genre tend to have really boring/unrelatable characters, but that was definitely not the case here.
I also loved that Gwen knew how to use her magic, but wasn't super great at it. A lot of times the magical person just knows how to do everything perfectly, and that's actually really annoying, so the fact that Gwen still struggled with her psychometry even after she'd been using it for years was a nice change. I also really enjoyed that when she sneaked out of the school it was to visit her grandma, and not to get drunk or hook up with boys or what have you.
Basically, I really enjoyed this book and definitely plan to continue reading the series.