I used a good bit of Bulma prior to jumping on the Tailwind train when it released. While it was a very quick way to get a nice looking page out of the box, the design choice of aggressively over-specifying selectors[0] made it incredibly frustrating to work with, especially paired with utility classes (e.g. Tachyons).

[0]: https://github.com/jgthms/bulma/issues/2292