I started using Le Creuset enamelled cast iron on electric coil, then gas, and now induction. I just love the way it cooks. It performs beautifully on induction, and there's less difference in the way the food cooks than in many other kinds of pans. I also have Le Creuset enamelled steel (not stainless--just steel) stockpot and teakettle. Both of these were gifts. Welcome ones. I do have to be careful with the stockpot on induction because it's too easy to give it too much power and scorch the contents. In my experience, the heavier pots are less finicky. The kettle has a heavy slug bottom, but the stockpot is thin. That makes it react very fast. That's what makes it important to keep the temperature down if you're going to turn your back. Otherwise, keep stirring! :)
When you're choosing cast iron (or any pot) for induction, remember that the more bottom surface that is flat on the cooktop, the better it'll cook. My first LC pot was a "soup" pot. It worked beautifully on coil. Even better on gas. It's fine on induction, but the beauty of it is that the rising heat from the burner heats the sides that curve out from the bottom, giving you a large evaporative area on top, and more heat on the bottom. On induction, OTOH, the sides only heat from the heat passing up through the iron, so it takes awhile for the sides to heat, and you don't have any of that benefit of capturing the warm air on the sides. That previous favorite doesn't get used for induction (I also have gas). Instead, a previous "eh" pot, the saucepan from the 2-in-1, which has a larger flat bottom and straight sides, is my go-to pot. Great for everything from boiling pasta (if you stir you don't need to waste gallons of water) to sweating vegetables or heating something up. I love the little skillets from the 2-in-1's too, and my braisers. The 1 qt. saucier is perfect not only for making a sauce, but also for melting chocolate (don't need a double boiler on induction) or making toffee.
I use my Le Creuset cast iron for 90% of my cooking. Contrary to what GreenDesigns implied, I love that by slinging around iron pots I can do less slinging of iron dumbbells, which latter is boring and accomplishes nothing beyond the slinging. My reaction to most women who don't have disabling issues who say that Le Creuset is too heavy, is that that's exactly why you need it! The more you use and wash and dry it, the less heavy it feels, and the more you're doing for your upper body strength.
The stainless ply cookware, from All-Clad to Demeyere feels just as heavy to me. Le Creuset is thin cast iron. There are other, cheaper brands that are heavier. They cook fine. They're just thicker.
I have one Demeyere skillet which I use for things I like to use metal implements in, like browning ground meat. It's 7 ply stainless. I haven't noticed any buzzing, but I always have the hood on. I love the Demeyere because there are no rivets inside the pan, and the silvery color they achieve is also very pretty. :) It's specifically designed to work with induction and does very well. There are some other ply pans that work, but which aren't designed for induction, which seem to have more issues with whining.
My other favorites are De Buyer carbon steel crepe pans. I have a few sizes. :) They have to be seasoned and maintained like raw cast iron, but they're thin steel. This makes them react very fast so you get to see all the whiz bang boom of your induction. They're great for eggs, crepes and any kind of small, delicate things. I never did like making eggs in cast iron much, though I couldn't explain why. The crepe pans aren't appropriate for a fry up or big things, but De Buyer also makes carbon steel skillets and stir fry pans.
Having said all this, there are many folks here who do very well with their $300 cookware sets.
The Le Creuset outlet also has sales. Usually May and October, if I remember right. There are really excellent deals, especially on factory seconds (usually have a small flaw in the color or something, but no issues that affect function). They reputedly will sell by mail from the outlets as well.
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