Love my Alegrias, I have 5 pair.  My only problem is that one foot is just a bit longer than the other, so one shoe is always a little bit tighter.  I wish they made an 11 1/2 (42.5), that's really what I am.  The 11s (42) are tight on one foot, and the 12s (43) are too sloppy once they stretch out.  But they are always well made and comfortable.  I also love the Professional line, they are slip resistant and if you work on a tile floor, you can really tell the difference between the Professional and the regular shoes.