>>>What did you regard as the negatives?
>>>Or, conversely, what do you see as the advantages of remaining with WinForms?
>
>>>The need to buy , learn expression blend to do the same job we now do with just the VS tools.
>
>I barely ever use it. It is nice for writing gradients and doing animations. Other than that I haven't really needed it. VS2008s built in editor that works well for most stuff.

The biggest thing I noticed with editing XAML in VS was, where is the intellisense? I kept expecting it to kick in like it does with edit code in ASP.NET, but nope, it never appeared. That majorly sucks when you're just trying to figure things out - it kills "discoverability".