I ran 10.9 miles this morning to put my first miles on the new Mizunos. The run was primarily on sidewalks and blacktop with a few very short sections of dirt/gravel trail.
They felt light on the feet and had a little slip in the heel when I first laced them up. I noticed it while walking pre/post run but it did not bother me during the run.
The soles are noticeable thinner than I am used to. This isn't a bad thing but it is definitely something to think about on days when part of my runs go on a little more hardcore trails for parts of the run. Also, I felt a ridge on both feet that ran along underneath the outer edge near my little toes. That isn't something I expect to feel in a shoe that is advertised as neutral.
These definitely are not going to replace my Hokas as a pair of distance trainers and racers. However, they will be a nice mix with my ASICS as trainers on my shorter runs and due to their weight, will make a nice racing shoe on shorter races.