I used it for so long but I never satisfied with the UI. The main flaw of the software is that, it should change the xml as per over design in real time. I often needs to write codes in xml but at the same time, I was forced to use the Design tab. Hence, it creates cunfusion between the xml and design tab. It should be as simple as photoshop. In which, both the tool and manual method works same in any manner.
