They run pretty dead on with normal shoe sizing however, like any boot they will stretch over time. I prefer my boots as tight as possible so I go with the size lower in my range meaning I wear a 11.5 shoe. I ride the 10-11/L boots. Super tight and hard to get into the first couple rides but then they loosen up and fit perfectly. Hope this helps.
I've ridden the Answers and the Marius.Both fit me fine.I wear a 9 and get the medium.Strings are chit,but thats the same on every binding i've owned.They are tight for the first dozen or so sets,then they are broken in.Medium in the flexibility department.If you have warranty issues CWB is easy to deal with.Hope this helps.