Got these in this weekend and put them on, the cons I had/experienced:
The clamping area seems bigger than 31.6 compared to my Zipp stem. I went to tighten them and heard some crunching, maybe it was my fault for going to 5nm, but I seemed to have to "jam" it in.
On my Deda stem I did not have this issue.
Getting the controls onto the bars was kind of rough, I had to wiggle them to the point that there was enough heat generated on the metal clamp for my levers, if that makes sense. Again, seems like its too "thick" compared to a regular handle bar.
Once I got everything in place and torqued to 4nm on the Deda stem, they felt solid. It's my first run with carbon handlebars so seeing any sort of "flex" is kind of weird, but they felt sturdy on the quick spin I took yesterday. I plan to take my gravel bike with these bars for a true test this weekend, fingers crossed, and that will be the true test!