I said the Fiesta had a horrible driving position - it may of gripped like crazy (I never found out) but it held no interest at all for me driving it. The older Fiesta (drove a mates '95 one the other day) feel better...
I had the chance to drive a Ka (albeit the older one with no power steering) when I was looking for a first car but didn't have any sort of proper insurance
It gets 37 MPG (officially), whereas I get about 38-43 depending on the conditions. I could live with that drop, but it depends on what happens next year.
EDIT - I could live with less MPG as it'd be cheaper to tax / insure...