Twitter's Bootstrap in the Asset Pipeline 14 years ago
Yes, I am.
I use the 'less-rails-bootstrap' gem and then use less for anytime I need to customize bootstrap.
For everything else, I use sass.
[ my public key: https://keybase.io/hwrd; my proof: https://keybase.io/hwrd/sigs/A9bZFbV8i69IlkTqtdAIbfqdRZloZj66jIDNa33dseI ]