Ranked in these QuestionsQuestion Ranking
Pro Great-looking demo
Pro Device agnostic
Since Materialize follows Google's guidelines for Material design, which in theory is device agnostic, Materialize itself is device agnostic too. It's designed to look good on every device.
Pro Large selection of components
CSS components: Badges, buttons, cards, collections, footer, forms, icons, navbar, pagination, preloader.
Mobile-specific: slide-out drawer menu, toasts.
Pro Mobile navigation
Pro Nice showcase of sites built with Materialize
While the default style is not bad at all, Materialize also gives developers the ability to customize it and fit their own style, while still keeping in line with the Material Design philosophy.
Along with the CSS files, designers can also download the SASS files which can be edited and compiled.
Pro 12-Column Grid System
Pro Included icon font
Pro Meteor.js integration by developers
Material design is very opinionated on how design elements should behave and look. The basics of which revolve around certain visual elements (physics, space, momentum and light) which are used to create specific UX elements.
This is very helpful because it creates a consistent feel without making every design look the same. This can be seen in Materialize too, where each element may be customized but still it keeps the consistent look of the material design.
Pro A lot of widgets
Webix is one of the most extensive UI component libraries, second only to Sencha ExtJS. Not only considering the number of widgets, but also the API methods for manipulating these widgets.
Pro Seems to be quite stable
Even the most complicated GUIs are bug-free most of the time.
Pro Webix Jet
The webix Jet library adds all the required features for SPA development (routing, template loading, ...)
Pro Extremely simple to implement.
To get started is extremely simple. It has a low learning curve.
Pro Awesome responsive material skins
Great design and icons pack.
Pro Great support from the webix team
The company behind webix is really quick in answering any questions you have on their forum or via email.
Pro Mature project
Regular updates and releases.
Con Not maintained anymore
Con Large / heavy
267 kilobytes, minified, for the CSS and JS.
No longer supported by their maintainers.
Con Commercial license
It's not free for commercial applications.
Con Not very popular
Not really a reason to not recommend it. But it has still a small user base. It deserves a lot more attention.
Con Not modular
The library is not modular (except for some additional more complex widgets). If you only need a few widgets, you still need to include the entire library.