Those of you who have or have used the skinzit, do you like it? The reason for asking is that is one of the items on my Christmas wish list. My wife went to Scheels to purchase one and was told by the Salesman that if I was good at filleting fish, I wouldn't need one and she would be wasting her money to make the purchase. He said that they are just another thing to have to wash, and are not worth the cost. He did make a few other suggestions and she did buy me something else. Those of you that have one are they a good investment?