Better Vim Syntastic Symbols

I love Syntastic, especially with Haskell, but I always thought the default symbols were a bit lame why not spruce them up a bit.

" Syntastic
let g:syntastic_error_symbol = '✗✗'
let g:syntastic_style_error_symbol = '✠✠'
let g:syntastic_warning_symbol = '∆∆'
let g:syntastic_style_warning_symbol = '≈≈'

Add the above as part of your .vimrc.