Which statement is NOT correct regarding the Ooni?

The statement about the Ooni being usable inside and outside for versatility is indeed correct. Most Ooni pizza ovens are designed with portability and versatility in mind, allowing them to be used in various settings, both indoors and outdoors. This flexibility is one of the appealing features of Ooni ovens, making it easy for users to enjoy pizza cooking in a variety of environments.

The other statements provide accurate information about the Ooni ovens. They are known for their ability to reach very high temperatures quickly, cook pizzas in a short time, and provide an authentic fire and stone-cooked pizza experience, which is a significant selling point for enthusiasts of high-quality pizza.