Ask HN: What are the main problems with Bootstrap framework you have faced?

Hi All. We're creating premier interface-building tool for Bootstrap framework. It will allow to master Bootstrap websites and user interfaces faster and easier, than ever before. That's why we have some questions for developers & designers who use Bootstrap framework.

Your answers will help us to build a better application.

Thank you in advance for your answers.

https://docs.google.com/forms/d/1qr2lmlfuZxfKi8g1cN_yfdRuscBWL5MAPNR6SyeLUQw/viewform?usp=send_form