No, really, it isn't. It just teaches you to fill up your html with a lot of useless classes while teaching you nothing about css, unless you want to change how

No, really, it isn't. It just teaches you to fill up your html with a lot of useless classes while teaching you nothing about css, unless you want to change how it looks, in which case you have to basically rewrite everything. It may be a good substitute for a first draft, but your website will be much leaner and cleaner without it. Also, I can never get over the fact, that the bootstrap devs seem incapable of delivering UI elements like dropdowns without additional javascript or can't even include a no-js fallback. That doesn't really create confidence in their abilities as web developers.