I was able to take my new fins (the fins in the above photos) out to openwater today and was very pleased we their performance. They were very light and provided a lot of propulsion from depth, by far my favorite fin I have ever used. I really like the Beuchat pockets because of the fit. I have a fairly narrow foot with narrow heal and they provide the best fit for my feet, with fins keepers they are perfect. I am big fan of fin keepers and cannot dive with them. I like my feet locked into the pockets. I experienced no cramping but still had a snug fit.
David