It looks about the same as GitLab's merge request / code review feature to me. The being able to dismiss a commit is different, but I'm not sure I understand that feature.

When I'm doing a big review, I copy the list of files into a text document and check them off after I finish each one. I've found that especially useful when the order of the files requires a lot of jumping around to follow the flow. I'd like to see this feature supported by a code review tool.