An "honest review" means giving your true opinion or assessment about something, without exaggerating or hiding any flaws or drawbacks. Full definition
I was very skeptical about offering my book for free in exchange for honest reviews because free eBooks are, well, I'd say a dime a dozen, but they are free. (positivewriter.com)
As I've struggled for my own reviews, I decided to offer a site with honest reviews of books I've enjoyed. (booksarecool.com)
I will give honest reviews on the products that I find and an overall rating out of 10 based on quality and cost. (blog.feedspot.com)