I tried the shoe in a half-size up, and didn't like it--not only did it look too long on me, but it also slipped down my feet like a clog at every step. I didn't want to have to wear thick socks with these all the time, and insoles don't always work for me (I know because I have several shoes that are a half size up and I never wear them despite having tried all sorts of insoles).
So then, because I love these shoes so, I decided to give the hair dryer method a try. And IT WORKED!!! And it was easy and quick! I still wish the shoe could be a wee bit wider or more flexible in my right foot, but it's stretched enough that I can wear it without pain with thin socks (even a thin Smartwool sock!!!).
I realize some people have reservations about the hot air on the leather and how it could damage the shoe. My hair dryer is small and never got burning hot, if that makes a difference. My shoes didn't warp (as some seem to fear). There was no discoloration, and the calf hair didn't shed. Now how this will affect the shoes long term I don't know.
I am totally going to pull out the hair dryer next time I have a borderline tight shoe like this one.