Project Siena is a RAD tool made by Microsoft to quickly make apps for Windows 8. As some who actually likes Windows 8, I find this tool quite interesting. However, it seems to be rather limited at this point, but I was only playing around with for a few minutes. Is there anyone here who has used to make an app with Project Siena, complete or not? I'm curious to know what people think of the tool and what kind of issues they ran into while using it.