Flex is very mature component-based development FRAMEWORK that REDUCES the development time and gives very good results. There are plenty of advantages: Easy to learn, Flash Player AVAILABLE widely, Works really well with other back-end technologies (specially with java), based on components so very easy to debug and fix, also has a very good IDE etc. The disadvantages are: applications USED to be slightly heavy etc. But all of them can be handled to a good extent by following up best-practices and good application architecture.

Flex is very mature component-based development framework that reduces the development time and gives very good results. There are plenty of advantages: Easy to learn, Flash Player available widely, Works really well with other back-end technologies (specially with java), based on components so very easy to debug and fix, also has a very good IDE etc. The disadvantages are: applications used to be slightly heavy etc. But all of them can be handled to a good extent by following up best-practices and good application architecture.