I rotate this shoe with a pair of 'Drews' for diabetics.  I purchased the ASICS as a reviewer raved about the roomy fit.  I'm 6'8" 390.  Its not roomy to me but snug and comfortable.

The toe box is firm, as is the heel area.  The mid gives a bit with every step I take.  Not in a flimsy way but in a supportive platform type feel.  I'm confident in these shoes.  Some shoes I don't feel that way.  I have neuropathy and if I cant feel my feet or my feet slip and slide around in a shoe I fall easily.  Not so in these ASICs they feel secure.  Good on my 'hammertoe' too.

The only reason I docked them a star is on the outside edges they feel like they give a bit and tilt to the outside.  I have a 'normal' foot as for pronation...this is probably due to my weight.  If it changes as it comes down I'll post a updated review.