I use the tech fins and a pair of Hollis f1's for current and open water. I used the tech fins exclusively last year. 90 % of my dives were done dry and they had more than enough power for my purposes. They were never intended to be an OW fin for use in high current. Their purpose is for wrecks, caves, and other right spaces. Also why they are so short. If I really need extra thrust I use the f1's. Or my scooter. Whatever I'm using its never a race.