In reply to TobyA:
all makes sense, but really, what sold spantiks to me was the outer.
the shiny stuff sheds snow really well and the overlap of the opening (with the dr who-style single lace) is really snow proof.
the stretchy gaitery thing around the top works well too. i usually tuck my trousers into them (heel cord goes under the inner boot) and they are good.
after a while the laces+zip of the baturas started to bug me. mine (first generation zip) never had any problems, but the inner laces were usually a bit of a hassle (new ones may have solved this).
in a country obsessed with taking shoes off, the spantiks are much simpler, along with being less snow-clogging and obviously warm.
the only thing thats bugged me with them so far is the stupid 'T' shaped pull tap on the back of the outer. catches, then one pulled off altogether - not that i miss it.