I got out of float tubing a long time ago. The buddies I got into fly fishing really took to tubing. So I got back into it... reluctantly. I have bad knees from playing baseball and basketball growing up. All of them have Force Fins and none have anything bad to say about them. I saw them and ordered them.
I went to see a friend at his shop, a prolific fisherman that dives as well. Just picking his brains, I asked him if he had any suggestions for fins and my pontoon. He suggested some Cressi. Soft, lightweight for size, fairly inexpensive ($130) and he thought easy on my knees. "Go to Sport Chalet, they got 'em", he said. Went online saw them. Damn! Those thing will put you on plane in a float tube. Hydrofoil city. You may get cited for speeding in the No Wake Zone! But my fins came in 2 days later.
The price of $200 for the adjustables are about $20 off regular price which you won't see too often; and the $5 shipping saved me another $10. I figure they'll last a while so I don't think it's that bad. Lastly, I think $200 would be an average mid-range dive fins. Omer, Cressi and C4 totl are over $500; average high end $350! Too rich for my blood. Makes the Force Fins look like a steal!