Have made a few posts on this in the past, the spec list has changed slightly about what is/isn't included in the basic specs from FIAT but the information is pretty much the same. Stop start was introduced in late 2009/2010 I believe.
We bought it new 1st September 2009 for 8700 after the scrappage scheme discount, and sold to a dealer for 7300 around March 2012.
Averaged 43mpg over 13000 miles, apart from fuel cost nothing to run, used no oil. Didn't do enough miles to require replacement of the brakes/tyres.
Faults we had were resolved by FIAT under warranty no problem, washer jets when it froze popped the mist tube out, replaced. B pillar trim had slight paint defect, replaced no problems.
Some ****** crashed into the front corner of it, wing replaced under their insurance for brand new by FIAT and painted, fit and finish as new. Had to push for it to go to FIAT and not their approved bodyshop.
Fine for running around town/shorter trips, we did a few longer journeys in it and it can get tiring on the motorway, noisy cabin and not the most comfortable seats.
The blue & me system works well, but can be hard to hear on the other end if the cars on the motorway due to the cabin noise.
Would probably buy one again for an around town/wife car, perfect for that really, low running costs, good residuals and good looks (subjective really).
http://forums.overclockers.co.uk/showpost.php?p=15708755&postcount=3
http://forums.overclockers.co.uk/showpost.php?p=19195150&postcount=23