I loved my Scuba Pro "Darth Vader" fins (the ones that are kind of octaganol looking). My son grew out of another set of fins (and wet suit, shoes, pants, etc. it never ends) and was finally big enough to use mine so I gave them to him and bought a set of twin speeds. The only thing I don't like about them is the length, after using them for a while they're just too long. I like them in open water but confined spaces are a pain. Also, as DA mentioned, the alternative kicks I've developed through the years haven't translated real well. I'm in the process of looking for something new again. Now I'm looking again with a lot of people steering me to twin jets. Unfortunately I haven't had a chance to try any out.