The way you can handle user input, also form validation as well with markos own validator functions for different types of fields (email address etc).
It's very simple but powerful tool! I didn't find anything in particular which could be improved or would need changing from one version/release into another - so there are no downsides at this time either :) We're solving our problems by building frontend-backends solutions together, we needed some kind of JS library where all forms get submitted via AJAX requests automatically without any manual work required after submission; This solved both issues perfectly because now everything gets synced up between backend & client side within seconds instead of days / weeks when doing things manually through multiple files written individually each handling part separately!