It's as tame as you want it to be.
The Zed is a good all rounder. I use daily with a mix of town and motorway 45miles a day. I avg about 25mpg. I managed 31.8 whilst going to Dorset, but 28mpg on the way back
The Zed loves to cruise on the motorway, and what's great about the 350 is that whilst the whipper snapper hot hatch is great around town, the 350 will eat hot hatches all day long on the motorway. The beauty is you cruise along in 6th, drop 2 cogs and because of the torque you'll realise why you bought the Zed.
But be VERY careful, the Zed has an inevitable disease called Zeditis (I won't go into it) but you'll soon find out once you get one and reside on the forum for a few months or weeks. Nobody has found a cure btw.