I often wear the Dansko Professional so thought I'd try this Solstice for days when I have to dress for business.  However, even though the 40 is more than ample in size for the Professional, it's just too tight in the Solstice.  I love the shoe, it's dressy and has a cuter heal than the other Dansko's, but I am definitely disappointed in the very tight fit of the shoe.  I'll try one size larger, but hate that I'll have to wait to wear them!