I happen to really like this. I used a few lines in vimrc to make mine a little more practical for me:

  "" airline settings
  " remove separators
  let g:airline_left_sep=''
  let g:airline_right_sep=''
  " remove unused modes
  let g:airline_enable_fugitive=0
  let g:airline_enable_syntastic=0
  " set second section to filename
  let g:airline_section_b="%f"
  " empty third and fourth sections
  let g:airline_section_c=""
  let g:airline_section_x=""
  " put filetype in fifth section
  let g:airline_section_y="%Y"

curious to see how other people have theirs configured.

my full vim config is on github [1].

[1]: https://github.com/daturkel/vim-config