Now that I have the windlass, I have the 22 Lewmar Delta and could not be happier. It did well in the tests too.
Two things are important to me, one of course is holding the bottom, but the other is getting it off the bottom when it time to go. The Delta sticks great, and has never failed to let go when driving over the top of it.
My trusty old Danforths held pretty good, but they were hell to get unstuck sometimes, and I got tired of straightening them out.