StAX(Mate) and WAX

I'm experimenting with StAX(Mate) for reading and WAX for writing some
largish, uglish XML. If you have any thoughts...

Why StAXMate?

http://www.cowtowncoder.com/blog/archives/2006/10/entry_27.html

Why WAX?

http://www.ociweb.com/mark/programming/WAX.html

They both seem to be simple and yet potentially relatively efficient.
I just hope they work without the usual disjointedness at the config
level that seems inherent in many XML librees.