Bascially, from what I can see the guidelines aren’t that strict and they follow what appears to be a decent standard of ethics.
I haven’t seen any previous guidelines anywhere else so I have nothing to compare and no comments to make. I’ve always tried to be honest with the reviews I write on goodreads. I’ll be posting one about John Irving’s book soon, and then one about Joel Stein’s new book…both I loved.
If you are interested, you can get there from here and read the review guidelines yourselves.