Hi Ryan,
Thanks for taking the time to read the article. The advantage of Jeet is its flexibility. Frameworks such as Bootstrap and Foundation require extra markup (div) that can be difficult to maintain. Of course, you can make your code more efficient if you customize them. On the other hand, Jeet doesn’t need any additional div or customization. All you have to do is to define a class name and then apply the mixins you want to it. So, the complexity is in CSS which is handled by mixins.