Ranked in these QuestionsQuestion Ranking
Pro Allows you to stay in the terminal
Since it runs in a terminal, it may live within ssh sessions, tmux/screen sessions, etc.
Pro Nice Themes for a terminal app
Vifm has a lot of good themes that you can easily grab from the main site and use with the :colorscheme command.
Pro Great integration with vim
The vifm.vim plugin allows you to use vifm as a powerful filepicker for vim.
You can easily configure almost all aspects of vifm by just editing the dotfile which is pretty easy is you are comfortable with configuring apps.
Pro Default key mappings will be comfortable to vim users
Vifm uses vim-esque key mappings. Makes for extremely efficient and---perhaps more importantly---intuitive interactions. The key mappings can be changed.
Pro Dual pane
The dual pane nature of vifm makes copy paste and moving files from one folder to another super easy.
Con Useless for non-vi users
Even to quit one has to use ":q".
Con Very high learning curve for newbies
Con Can only be used in terminal
Vifm lacks a standalone GUI option.