Very compy. My first Mizuno. BUT, the width is narrower than other brands (I usually wear D(M)) which's really annoying.
Therefore (and not only), I think Mizuno should also offer a 2E version. I will enjoy this shoe but won't go for the 14th model, if won't be any changes concerning this issue (wider default D or EE option).

In terms of quality and comfort, it's superb- more than everything else I tried. I use orthodics so my experience is a bit upgraded (but most serious runners do).