Is there a website for rating and reviewing journals openly?
I know just one site where you can review the manuscript submission process. It is called SciRev.org:


  The idea for this website was born from our own experience with the scientific review process. This experience is similar to that of many colleagues: endlessly waiting for an uncertain outcome. Through SciRev.sc we aimed to improve this situation by offering researchers the opportunity to share their experiences and select an efficient journal to submit their work.


I don't know if this website is well-known by the scientific community, but I consulted it because I had some problems with a particular journal and I found comments from researchers that had the same issues as me. I think that it is pretty useful.