It was a good retelling of Rapunzel, but there are several things that just didn't cut it for me. I had high hopes for this book, since it is my first time reading any kind of retelling. 
I'll start with the bad, then end on the good:

First, the chapter lengths were so very uncomfortably short. It didn't allow for any wiggle room, or the ability to get really deep into the story and get lost in it. Which is the whole reason why I read. The whole reason for me is to get lost in the story and I didn't really find myself getting lost in it, just more of being uncomfortable. It just felt like I was someone who was unwanted in a room when mom and dad are arguing, and you want to disappear.  

Secondly, what the heck. Why is she wanting to get it on with the vampire she literally met not even two weeks ago, and even then, they had like, what, two or three conversations. I get it, she feels lonely in the tower, but really. This isn't even realistic. But hey, its fiction, so I guess it doesn't matter. Though there are about two or three scenes that do "go there", albeit each time is only about two or three very short paragraphs.

Thirdly, there were a few times where it was really nice to see her enjoying herself at the Vampire Castle learning new things and such. But at the same time, it was awkward, though I guess that it is just because she didn't have any interactions with others outside of her "mom". Also, she seemed very trusting with her love interest's mom and was telling her things.

Fourthly, I loved that she was able to find a way to have a companion, and though I have a fear of spiders, it was really cool that she got to have a spider as her companion and that she was able to get it to communicate with it's "cousins" to go throughout the land to find out things and tell her stuff that helped. So it didn't seem like she was a total damsel in distress.

SPOILERS Start here:
I liked how she got the spider cousins to go whisper to her real parents and to get through the spell.

Fifthly, I loved how she was able to figure out that she could pull shadows from the Vampires that essentially kills them, or at east makes them super weak.

Overall, it was a good book. I'm not sure if I would recommend it. But if you don't really care about getting to deep into the story, then go for it. Would I re-read it? Probably not, but there is a small chance that I might go back and skim it a little. But I am interested in the other books in the series.