By reading the stream of comments on the PR, and from my own experience, I feel that it is extremely cumbersome to do code reviews on Github. Atlassian's Fisheye/Crucible looks like a better solution. Does anyone think otherwise? I think Github has a large room of improvement in this regard; a PR is not the same as an issue.
I've been using GitHub for code review (both open-source and commercial projects) for about 5 years. It's improved a little bit, but for PRs with >100 files changed it's obviously lacking good UX. For me, the biggest improvement would be the tree-view you get in Fisheye/Crucible. It's so hard to get a grasp on large refactoring PRs on GitHub.
[1]: https://addons.mozilla.org/en-US/firefox/addon/better-pull-r...