I went to a local running store, "Jack Rabbit" and had my run video taped.  I had been running with the Kayanos but found out I'm a neutral runner and I don't need the extra support against pronation. Plus that support "feels" funny if you don't need it.  I bought The Nimbus 12 at Foot Locker because they were on sale.  I was informed that Asics in general had a bigger "toe box".  They were so comfortable I wore them everywhere!  Then I got a hole in them and ordered the Nimbus 13 because everyone was out of the 12. Well these shoes are narrow.  Every time i put them on I feel like my feet are in clamps!  And they won't break in, they are just narrow.  Still a good shoe I think, but I would advise you to try them on before buying, especially if you were formerly a Nimbus fan.