Could you use it to determine whether you would like the book?
Personally, I don’t think so.
Based on my own experience, I can say that books that rate 3.6 and above (with 5 being the highest) are good enough. However, YMMV on whether you like the book or not.
I have loved books that 3.6 (meaning that a lot of users have rated the book as below 4) but have hated books that rate 4.15 such as the one above.
So in short, the rating system on Goodreads is not a guarantee that you’ll like or dislike a book. It just tells you what a majority of the confirmed readers on Goodreads think of the book.
Don’t feel discourage if you go against the flow. You are your own person , after all. 🙂