ViewerSvg is the best svg to XAML converter for WPF, Windows Store, Windows Phone, Universal Aps and Silverlight.
My confidence in ViewerSvg is so good because it not only can accurately convert svg files into XAML but also has the following additional great features:
ViewerSvg is using the Ab2d.ReaderSvg library that imports objects from svg and svgz files at runtime. With the library it is possible to use svg files just as jpg, png or other files. Ab2d.ReaderSvg also has many advanced options and other possibilities that are not possible when using a converted xaml file.
To see the development history of Ab2d.ReaderSvg and ViewerSvg, check out the related blog posts.