I currently have a fiberglass Glide in stiffness 3, which has always been a bit stiff for me. I was able to try a carbon Glide in stiffness 3 and it was perfect for me. I was about to purchase one, but somebody suggested that I try a Powerfins mono from Oleg. I did a search and only found one mention of the fin. Has anybody tried one that can compare it to the Glide?