I live in southern greece, so its mild to hot all year long.
I don't have any long term experience on the matter, but the 147 I got 3 months ago had Michelin Pilot Sport 3s (205/55r16) fitted a little less than a year ago. They have done around 6000km (3000 by me) and they look like new. They have amazing grip on dry and wet, but are a little unpredictable sometimes on very bad quality tarmac (nothing bad or unexpected, but you get used to the insane grip and when you slide or driver aids kick in it feels weird).
I was very worried about the soft sidewalls, but had no problem with them even aften hitting some really bad potholes and climbing curbs.
Also I had no problem taking the car on bad dirt roads, in terms of feel or durability.
The mechanic who knows my driving habits well told me that those tires are by far the best choice in terms of value for money and that they should easily last 4 more years with a front/rear swap sometime in the future.