I am had a good  experience from use Oracle ADF 11g.
It has very comfortable and useful Component that we can use in our web application,but there is a problem,this components have many problem in browsers such as IE7 and upper
,FireFox and opera and the problems are different in each browsers.
So,I You want to have and hi performance application  with pretty good Component i suggest to ADF 11g,if you cant solve the problem.