I love Altras.  They are my favorite shoe of shoes because I love the wide toe box and zero drop. I have many many of the first model, the Altra Instinct.  I love them.  I ordered the new revision Instinct 1.5 and am very disappointed.  Mine were much tighter in the toe box and mid foot.  I felt very restricted.  I visually could see the difference in the width. I re-read the Altra write ups on this newer 1.5 Instinct and did not find any info that said that they run narrower in the toe box. So if you are an Altra lover who already loves the Instinct, just be on notice that the 1.5 model may not be as comfortable as what you have and make sure that you can return them without too much shipping offset.... Just my .02 of course.  I gave it a three star as an OK shoe but it is not for me. Still love you guys at Altra and am sure that you will continue to provides lots of excellent shoes down the road.