I love J-41, well made, nicely styled, comfortable.  I was a little confused when searching for them and Jambu came up (not knowing about the transition).  I thought these looked terrific, particularly because they are real leather... but what a disappointment.  They pinched in the toe area (and I have narrow feet), the heel slipped; an unusual combination too wide at one end and too narrow at the other.  I returned them even though shipping from Hawaii cost me $25.  I will not wear uncomfortable shoes no matter what they look like.  By & large love the brand, but this style has some real issues (did replace them with another J-41 style).  This is the only style I have tried which just doesn't work.... in fact, I usually take half a size down (from my usual size) in J-41s.  These were tight, even though marked medium.