It's very easy to use for frontend development, I can add any element with CSS class without writing JS code. You have many options of customization available in this framework like - adding your own components or using prebuilt ones by other developers. The documentation could be better as it is not so good compared to its features. If you are looking for some light weight framework then go ahead otherwise don't waste time searching other frameworks. We used this tool at our office where we were developing application for mobile devices.