I really like the design of these paddles.  I had been using the standard issue flat ones and those provided good resistance.  These however, provide good resistance and help me focus on my form.  I find that after swimming drills with these I am better able to maintain the same more efficient stroke.  Don't tell my coach, but I enjoy the pull drills now!

Great for upper body workout and correct habd and arm position

Paddle does the job but size is too large...and size difference is too much between Medium and Large.  If you're average size guy....5'9 / 165lbs with average hands, buy the medium.

The cupped shape is very comfortable and scoops the water well.  Holes in the paddle keep paddle nicely balanced.  Although the paddle is true to size, your hand does not easily slip through the wrist opening - putting these on is a two-hand exercise.  The straps are durable and you get an extra set to boot.  I would recommend these.

great for tweaking form

These are the best swim paddles I have ever purchased. They fit great and stay on wonderful. They are very durable and the contour of them is perfect.