I bought these to use on a tread mill and so far they work alright.
I don't understand the way sizes are figured out on shoes any longer. I wore a size 11until i got into my forties. Then over the last two decades my feet have grown two sizes?? Go figure.  I ordered these in a 12 3E.  The width is fine the length is too short. Reordered a 13 3E, and they fit.  The shoe feels good and supports my narrow heel well. The memory foam foot pad is okay but you can't remove them. I use inserts and just place them on top and and there is enough room for them.  What I noticed after a few weeks of wearing is the stretching of the fabric has required me to tighten the laces up quite a bit to keep them from sliding. I guess this is normal; don't really know.