I have them on my Dawes Audax too. Never had a puncture in about 3000 miles, seem to roll okay (I overtake some people freewheeling, although this may be down to pies eaten and beer drunk rather than the tyres). Reasonable performance in the wet, possibly a bit lifeless. I beieve there are also Blizard Sports which, I think, are worse than normal Blizzards.
When they finally die I will probably get Krylions though.