My car normally runs the 15" 185/55 tyres; the ones I bought from mytyres were 14" 175/65 on steel rims. This is the smaller rim, but with the deeper/higher profile tyre the overall diameter remains the same. I believe the "base" model Jazzes run this size as standard. Before buying I checked with a Honda dealer what the exact rim dimensions should be (with respect to the "5½ x 14 4 x 100.00 x 56.00 ET: 45.00" quoted on the mytyres website). The dealer couldn't find out what the Honda dimensions are specified as. So I took a wee bit of a chance you may say and ordered the wheels from mytyres.
I was pleased to discover they were a perfect fit. I wondered if there might have been a problem with the locking wheel nut, but all fits fine.
As for the drive, the ride is slightly softer (with pressures at 32psi, which is maybe a tad too high) and steering is a tiny bit not quite so accurate, although it virtually eliminates tramlining on rutted roads. They are also usefully quieter than the summer Bridgestones, though the Bridgestones are known to be noisy.
Its nice to get them on as the winter pulls in as you feel a bit more secure, the deeper profile is slightly more pothole proof and the narrower width helps with deep surface water which in the dark you can misjudge. Summer comes along and you slip the summers back on, giving you that ko-kart feel / wind-in-you-hair / sunglasses / isn't life good feeling... Remember that?
I bought the Nankangs, which is all I could get last winter (they were completely out of stock for weeks). I'm a bit of a tyre snob so would have probably chosen something with a top review, but I can't fault them. I ran them for 3.5 months /3000 miles (motorways mainly) and they lost less than a millimetre of tread.
(Note the car handbook has a section on tyres, and lists the different approved sizes).