Other than recommending the use of full ankle socks to use this product instead of the socks it comes with to avoid side blisters, this is a great monofin for it's price. I was expecting a "regular" quality product to use while training, yet I am surprised to see it is well made, sturdy, comfortable to kick, and efficient. In fact for intermediate swimmers who know technique, this will let you swim all day long even with a medium blade which is what I purchased. The black finish scratches easily, and that is expected. Avoid scratches if choosing black by using it in open water only, the other color is will likely hide it's marks, yet it will be easily seen underwater for hunting. Soft blade is highly recommended for free diving in order to use less energy, yet I am comfortable using medium which allows me to kick softly to preserve energy, or kick harder if I want to move. With my other hard monofin, I can clear the water surface on a jump, with this one, I barely reach up to my knees. The optional wings also prevent scratches on the one side they are applied, and I wish the product were offered with the wings on both sides of the blade. It is possibly the best beginner's blade on a budget option, and will likely exceed all your expectations for it's price.