I use the boil over stop for 2 years and can not imagine my cooking without him. It works perfectly, so I can not understand the bad reviews. The truth is that it in the dishwasher a little warped, but only if he is at 70 ° C in the nether basket. But what is not a problem because you easily get it back into shape. Although it is not necessary to put him in the Spülmasche. It reaches him briefly rinsed in clean water. It fits all my pots on it and the normal lids are usually only used to cover the table to keep warm or eat after. I used it a number of occasions in milk and my oven was then still clean. And I had not ever stand next to the milk pot to watch. Mostly I use it for pasta and potatoes. Once the first foam erscheit above the lid, I can turn the oven back and it cooks without further problems and not over. This also saves energy! The price is also just great, especially compared to other cooking About Stop's what you often see at the fair.