Simon says: "my experience the MSTK is significantly more compliant with the specs than ASP.NET web services."

My experience (and the interop results from SOAPBuilders) is that both products have very few interop bugs. And where there are reported interop failures with ASP.NET Web services, it's because we didn't support a certain section 5 features (specifically: HexBin, sparse arrays, and multidimensional arrays). If having those features equals "signifigantly more compliant", I disagree.

We default to literal, because we feel that it is much better than encoding.