These are hands down the best Quads I have ever used. Currently I have them installed in a 9'5" HI Cruiser and have been surfing anything from knee high's to 6ft reef breaks. I cannot say enough about the speed, hold, and release of these fins this past year. This is my second set of quads and that is only because my originals got a bit dinged up when I lost my board surfing some waste high slop lol. Anyway, these fins make the HI cruiser feel much faster and performance oriented, especially when engaging the rails to make a section down the line. The hold I can get from these fins while on the nose is very surprising, quick 10's and long 5's are not a problem with these fins. I would argue that they due better than when I put a big single on the board. The fins release quickly and provide solid cutbacks and check turns when setting up. Check them out!
Me: 5'10", 190lbs, intermediate surfer on a good day ;-)
Waves: Waikiki Canoes Knee Highs to Haleiwa overhead hollows (just need a little angle in the dangle on the drop)