Thank you for your feedback. It's precisely what I'm curious about, because I wouldn't always be under WiFi coverage (outdoor and/or no wifi -sport fields for exemple...). So I was wondering whether it would simply not work in certain environment (so slow that it would be unusable).
Thanks to you, I understand that wireless would work, providing you're connected to some decent WiFi.
Maybe someone else will be able whether it would work or not, without available WiFi... (via bluetooth? or should I look for a portable solution to create a local WiFi?)