Took a chance searching amazon for a product like this. Did not know these diffusers existed. I spent a good amount of money on my old cookware prior to changing out my range to induction and did not want to give them up. Was surprised to find out they did exist and chose this one. It has a flat design without a fixed handle and lays completely flat. The cookware can sit nicely flush against it. If there's a gap between the cookware and diffuser, there will be inefficient heat transfer between them. Drawback is that you have to rely on the wire handle to move the diffuser where others have the handle already built in. So far I have yet to see a need to have that ability but others may.One thing I may suggest is to buy the right size to match your cooktop hob rings and also the type of pots / pans you are using. You definitely can go with the bigger one and have the ability to put a smaller hob ring and smaller pot/pan on top of it. It could create an unsafe heated area outside of your cooking space which can burn or melt any items coming in contact with the diffuser. No different if cooking with a conventional stove but for those who are have induction know that the heat is generated in the cookware base and not the range cooktop itself. There is dangerous heat around your cookware but not as intense as radiant or electric coils which can burn items on contact. I saw some other comments with folks that have induction cooktops that may not like the diffuser and turns off because of unsafe temperature. Mine doesn't have that problem and works fine on the big or small but can be different depending on which type of induction range you have. I'm cautious not to put the diffuser on high temperatures beyond 75% and for prolonger periods just to be safe.Have not had to clean it yet but expect to once I experience a major spillover. Crossing my fingers that will never happen.It works as advertised. The handle is useless. You cannot cook with it on as the pan is not level. You cannot remove it from the cooktop without raising it up to insert the handle. But for price it does the job.Needed something to distribute induction heat from a 4-5" induction coil to a larger pan. This distributes heat well, but you do have to run the induction burner at a higher setting to get the correct amount of heat. The induction cooktop also gets significantly hotter so it may cause issues for the burner in the long term but so far it does what I want it to do.I absolutely love my diffuser, saw it on the Rachael Ray cooking show. I have stainless steel cookware and a gas range for the first time in 40 years. I love cooking on gas but it certainly doesn’t have the even heating that electric ranges have. I ordered the diffuser, love it and will order another, it makes a difference in your cooking. No longer have to stand and constantly monitor so your food doesn’t stick or scorch in the center of the pan. I highly recommend it.This disk does not work as an induction adapter/converter--something that would allow you to use non-iron pans on an induction burner.Unlike the description, it is a 1/8 inch thick piece of some metal--it does not have a layer of aluminum sandwiched inside, which retains/distributes heat better. I heated it on medium for half an hour, and the pot I put on it was barely warm at the end.Further, this disk is badly milled. Mine had a large area of scarring and brown splotches of polishing material; plus the backs of the holes for the handle hadn't been polished--there were sharp burrs.The disk might work as a heat diffuser for a gas stove. But you could get a better designed one for under $10.I've returned mine for a refund. Do yourself a favor and avoid that hassle--check for objective reviews and buy an actual converter.Worked well on my glass top stove for my purposes, but the handle can't work on a glass top stove, only gas or perhaps the coiled electric eye.Takes little time to cool and when using I induction burner does not shut off as soon as you lift pan because it still making contact on surface.I bought it so that I could use my induction cooktop with pots and pans that were not magnetic. This is the perfect heat plate. Excellent heat distribution. I use it on my gas stove as wellDelivery was quick; arrived much earlier than the suggested delivery date. Product was received defect-free. It works with all of our non-induction pots and pans. No frills, no gimmicks. Gets the job done. There's even an after-sales agent contacting to see if product made it ok or if I had any questions. Overall, I'm pleased with the purchase and service.Buyer beware. Product is junk as the handle is useless. When you put the handle on it will scratch the cooktop. If you reverse it, the plate will lift off the cooktop. Essentially, you can't use the handle when on the cooktop. It cost me $19.58 for postage to return this piece of junk as the seller wouldn't cover it. Don't buy anything from this seller. I would give it a negative rating if possible.