Ranked in these QuestionsQuestion Ranking
Pro There are versions for a lot of applications or it's easy to make your own
There are ready-made packages for Vim, IntelliJ, Emacs, iTerm, etc. If your app isn't supported the website explains clearly what colors are used, so it should be easy to wrap up your own.
Pro Works well with multiple fonts
Since Solarized has pretty good color separation it's easier to distinguish both thin and bold fonts.
Pro It seems that is has been given the most thought
Judging from the description that has been given by the author, it seems that this color scheme has been designed with huge background knowledge about colors and relations between them.
Con Low contrast
Comments for example, have very low contrast against the background which makes it harder to read.