Some authors state that anything lower than a 4 or better rating is not worth showing or paying attention to. But doesn't anyone pay attention to the explanations of each rating on the review site? A good solid 3 or better means your book is GOOD. That it was worth reading, and the reviewer liked it. A 4 or better means your book is VERY GOOD. That the reviewer loves it. Would read it again for certain. Had trouble putting it down.
A 5 means you just walked on water, as far as the reviewer is concerned. Your book is a "must buy". Could not put it down even to go potty. Would fight a friend rather than lend it out.
But here is the catch...and pay big attention here...no two reviewers will feel the same about your book. For instance, my debut book, Out of Her Dreams, was reviewed by one of Joyfully Reviewed's review staff. The reviewer liked it very much, but had a couple of "buts" to toss in, meaning that it had a minor flaw or two as far as the reviewer was concerned. But all in all, the reviewer loved the book.
Joyfully Reviewed does not "rate" a book. You can only tell by the last line or two of the review whether you just walked on water, or sank in the creek. So I figured maybe a 4.5 at any other review site would have matched that one. A few months later, a second reviewer from Joyfully Reviewed did another review on OOHD. And the sweet lady raved about the book. Adored it. Said such complimentary things, I actually blushed. Now that one was a solid 5.
Now, I do believe that getting a great review is fabulous, but if you don't happen to get one, that does not mean your book sucks and should be instantly burned. I have read books that the reviewers hated, and absolutely loved them. I try not to pay much attention to reviews before I read a book, because I want to go in with an open mind. So when I got some not so dazzling reviews on a couple of my short novels after that, I tried very hard not to feel bad. None of the reviews was under a 3.5, so I felt like I had written a good, solid book. However, when I got 4's on those same books, I felt vindicated. Not every one likes every book you write.
It seems funny in retrospect, because the one book that I got a 3.5 first review on was my best seller ever. The book sold over 800 copies the day it was released. Not one of my 5 rated books ever did so well on the first day. So if you place a great deal of stock in reviews, and feel bad about a review, my advice to you is "don't burn the book". Just get out there and promote it, regardless. There are folks out there who will love it!