I liked the book, but be warned, you may find the end a little disappointing. I, personally, thought that it was cut a few pages too short, like the author had just suddenly stopped. However, this may just be because I hate open endings.
Tess's voice is brilliant, and unusual, but 'Lost It' didn't have me racing back whenever I had a spare minute. There was just something lacking, for me.
Ben is great, and Tess's reactions to him are very funny. He is a very lovable love interest, with a lot of depth, which is rewarding to see in YA fiction!
But I say buy the book and see for yourself. It's a short read, so if you decide it isn't as good as you expected, you will have only lost a few hours of your time.