what are you developer dealbreakers?

From a developer standpoint, what are some deal breakers for you when evaluating a new product. For me, poor docs is probably number one. It is usually the first place I go to after the landing page. Docs are the first line of support for a developer, if they are not well written with clear examples, I see it as an indictment of the rest of the customer service . Second would be having no free trial or way to play around with the tool, I like to experiment and bit and check that it actually works for my use case.