We just picked up a 1.4 EX in Cerulean Blue, trading in our 2003 1.4SE.
Comparing the cars, I kinda wish we hadn't gone for the EX - it just seems to have many features that aren't really necessary. The glass roof, climate control and cruise control are all a bit pointless on a city car. I also think the 16" alloys with quite low profile tyres are prone to damage. I've discovered that there are very few suppliers of that size tyre (185/55R16) and so they're expensive. I'm also dismayed about the lack of spare (and we did have cause to use it in our old car), that could also mean having to buy a replacement tyre in a panic, with no chance to shop around.
I think the car rides a little better than our old Jazz but the low profile tyres probably aren't helpful. I reckon it's still bumpy, but perhaps the bumps are better suppressed than in the old model - they're not being smoothed out by the suspension. The car does feel much more refined.
On the wind noise issue, there's no noise from the sides of the car, but it does suffer from a buffeting / disturbance which my be related to the glass roof. It's not intrusive, but quite noticeable. The engine is very quiet but I quite liked the old iDSI engine and I don't think the iVTEC really suits the Jazz. The iVTEC does go well though, but as others have pointed out, you need to use higher revs than the iDSI engine to get it pick up.
I know not everyone was a fan, but we did like the old roller blind boot cover - the new setup with clip-on flaps is ridiculous. The two tier boot is quite bizarre too.
Agree that the interior plastics seem much cheaper - everything a curious mixed of hard or soft to the point of feeling flimsy.
I think the power folding mirrors are a good idea but surely they should auto-fold on locking, or at least with the ignition off? If you leave the car kerb-side, you need the mirror out to check it's safe to open the door, but then you can't fold it. Not even manually. Bonkers!
Must say that, overall, I thought our old Jazz was marvellous - it felt very well engineered and like it would last forever, but I don't feel the same way about the new one.