Many people, including myself, have reported problems with their Stoke pizza oven not getting hot enough. In most cases, it’s a combination of a faulty gas regulator and some odd design choices that prevent the stone from preheating in the pre-designated amount of time (20 mins). Getting a new regulator will definitely help, but the design issues mean you’ll always need to let it preheat for up to an hour to get it to the right temperatures—at least in my experience with it.