The main snag, on the other hand, appears to be the wide range of PC hardware that is compatible with Chrome OS Flex, as well as how that gear will interact with the operating system. There is a list of “certified models” that are currently certified or are slated to be certified with Chrome OS Flex that has been released by Google, and many, many of them have the caution “small difficulties expected” next to them. The search engine giant describes “small difficulties” in a cyclical manner, saying that “models are likely to enable at least basic functionality, but are still being worked on by our team. You might run into some minor issues.”