Awesome shoes like the above reviews.
Make sure to accurately account for the incredible lowering of (shoe)stack height if you have the Speedplay dedicated soles. Coming out of a pair of Shimano shoes I had to adjust my saddle down almost 7mm due to these shoes getting me that much closer to the pedals. The lack of the adaptor plate for 3-holes (3mm)and the stated thinness of the soles of these shoes(only 3.5mm) (while remaining very stiff) came out to 6-7mm for me. I used calipers to eyeball the thickness at first as the stated 3.5mm sole thickness was not stated when I bought mine, but I was within a mm so all good.
Therefore a significant lowering of my center of gravity that I certainly feel descending as I am a tall guy always striving to get lower.