I learned “by doing”, the samples with source code helped me most, so my opinion is that a swing developer can start
immediately the programming with Vaadin .For me , the speed of the development was the same (in both cases I’m not using a visual designer).The develop of a screen of my application takes about 1 hour , a very short time comparing with the time needed for implementing the business logic .The few technical problems which I had were solved quickly
by browsing the forum.In the end, another 2 observations :
- in the past I used Echo framework , but now I’m using Vaadin because the components look better, the support is
better and the framework is in continuous improving - I don’t have any knowledge about web technologies (AJAX etc)