For TtS! I use 120mm wide standard units on a 6' x 4' (180cm x 120cm) mat with a 15cm grid.
Me too.
TtS isn't the easiest read, we found For King and Parliament (the ECW version) much easier to assimilate, then TtS just slotted into place. Once you get your head around the rules they are dead straight forward to play, and we rarely look up anything in the rules during a game, it just flows.