I wear a size 8 or 8.5 shoe and need something wide.....and the reviews stated these tend to be wide.  The 42 fit very well.  It  does take some time getting used too, as I have never work a bike show before.  I use this show on our indoor Eclipse IC2 spinning bike.  USe the SH 56 shamaino clips with the shoes.  To be honest, I think I prefer the regular shoe with the harness system over cycling shoes.....no fault of these shoes though, just a personnel preference.