I'll disagree with Andrew slightly in that velcro wears out (mostly due to UV, but also from use) and will slip/fail. I have a 2 year old strap that no longer will hold (used approx 120 days) , so I'm now replacing mine every year. Just something to be aware of. I would never go back to line though.
i used to have roosters velcro strap ono my old boat (144679) but wheen i got my new one it had the rope, very much thinking of going to the new kevlar one, but alot of the sailors at my club are sticking with the rope