Comfort is great, I wore them for maybe 3 or 4 hrs today. 5 and they feel almost too small (but they do fit). I love keeping my iPhone and Apple Watch together The cost of the shoes prohibited me from buying in all of these intervening years. I switch the band on my Vivoactive all the time…I just had to know the correct band size for that one. Theres quite a thumping base their but not much of a middle range to balance out that treble. Something else I love is how practical connecting them to my computer is. These will be my new go to brand for tennis hard court shoes. totally great buy Bought these for an upcoming trip.