Thanks for your kind words! The guy who was riding that sea bike didn't push that hard and he was moving forward nicely... So, not sure how hard is it to drive... But, as I said in some other comment, it's probably not for the rough sea times, but rather when it's calm like it was that day...

I'm not originally from Spain, but I've been living in Spain for about 13 years now... We lived very close to the place where I took the sea bike photo, but now, we are more inland... 30 minutes to the sea by car... ;)

Cheers!