The ability for us as developers not only write better code but also understand how our projects work in general (without having knowledge about js). Also there are so many useful plugins available at free which helps me solve almost all problems I face while developing my web applications using cosmicjs framework. Sometimes when you need something specific from cosmos library then its difficult sometimes because they dont have documentation properly made yet! So we use google chrome developer tools console instead with this problem solved easily without giving up anything else. Definitely go ahead if u r looking forward doing some heavy lifting stuffs like animations etc., It's way more easier than other frameworks out here specially those who don't know javascript very well can get their head around cosmicJS pretty quickly. We've been able develop application really fast compared others by just writing less lines/code rather focusing over understanding what each line does behind them :).