I'll start with saying that I love this model - it's cute and (eventually) comfortable. Sizing issue, on the other hand, was a pain (literally). I normally wear size 9-10 (regular shoes). Through trial and error I found that in New Balance world I'm 8.5. The problem is that 8.5 fit nicely for about 2 months and then they get so big - they fall of my feet. This time I got 8 thinking that maybe it will solve the problem of snickers getting way too big over time. They turned out way too small. I exchanged them for 8.5 (this model above), they killed my feel for about a week with bloody blisters and I almost gave up on them, then  they finally got to a comfortable size and a week later - voila, I think they are becoming too big.

Long story short - picking the right size is tricky, you might try a couple of different ones. Expect them to get wider so get a 0.5-1 smaller size than you usually get and prepare a bunch of bandaids for  the initial period of breaking them in (or have them stretched by a professional).

ETA (03/22/2013) Ok, 2 months of daily wear - the inner lining starts falling apart. This seems to be the issue with all New Balance models last 3-4 years - the quality really dropped. I was hoping this model would be different, but - no, same issue.