[emsy]

JSF 2.0 improved a lot in comparison to JSF 1.x but is still crap compared to nearly any other Java web framework. I have worked a lot with JSF. At the end of a development cycle of a large app, we decided to start over and evaluated other frameworks. Nearly every problem we had with JSF (which manishsharan listed correctly) were non existent in the other frameworks. Not only that but they were mostly a breeze to work with. Once you start using JSF extensively you know immediately that it's a standardized platform becaue everything is a compromise. Then you hear that everything sucks less with Primefaces until you find out how inconsistent the API is and how unprofessional the code looks (this may have changed now but was definitely a problem 2 years ago).

I can sign manishsharan's approach: just use a REST server and a SPA framework. It makes frontend problems leaking in your backend much less likely to happen (another problem some developers had with JSF at my last job). You are forced to separate UI and backend which is a problem that's not exclusive to JSF. It's also easier to make features of your webapp available as an app where it makes sense.