I have been a Calphalon user for many years and when this product came out, I was intrigued. So, we bought a complete set about 10 months ago and discovered some short comings. Some may be okay with it, some may not. First, the fact that you could use metal utensils was one of the main reasons we purchased this product. Using a simple metal spoon to stir seems to be fine, but when we used a metal whisk while making a gravy the bottom of the pan looks to be severly scratched. It still seems to be non-stick, but we do not use metal utensils on that pan anymore which defeats why we bought these pans in the first place. Second, the pans need to be stacked in a certain way due to the number of lids and the diameter of the pans. This sometimes leads to having several pans stacked inside each other and difficult to get out the one you need. This is not Calphalon's fault, but just something to consider. Or you can put lids on each individual pot/pan, but this defeats the space-saving nature of the pans. Third, and I should have thought this through. With no center knob on the cover, it takes two hands to remove/replace a hot lid which is not always convenient when you want to just do a quick stir or while holding the pan handle. I admit this is a necessary design to be space-saving, I just didn't think of the impact it would have while cooking. Lastly, from all the stacking/unstacking the edges around the opening of the pan are getting worn down by the bottoms of the pan being put inside of it during storage. All of our inner edges are now silver. This does not impact their ability to cook, but these were gorgeous pans when we bought them. Less than a year later, the look like we've had them for years which is disturbing based on what we paid for them.