We had a possibly relevant discussion
a while back.
I've used the camp fours on some low class 5 stuff (that cp0915 might do in tennies); they are very sticky, and have significant tread compared to most approach shoes. At times, they seem too
sticky, especially when descending, nearly causing face plants.
Mine also stink to high Heaven when I sweat a lot.
I find that most 5.10s are made for higher-volume feet and often have a toe box that seems a little narrow for me. The camp fours seemed that way at first, so I used a shoe stretcher on the toe box.
I tried the camp fours with BD steel strap-on crampons, and had to be very creative with the strapping, to keep the boots from popping out. The BD crampons are known for having very low backs (the plastic connecting piece between the strap holes). They don't seem to pop out of my CAMP crampons.
This is about my personal limit for the camp fours; that's more a reflection of me, as CP went up this with just athletic shoes in the past. The wide heel does make it a little harder to find small footholds (witness the sprawl of my left leg).
Credit: Sarah T took the photo.