make sure the hardware really works
Also make sure the software really works, one of the main issues with Linux adoption by hardware manufacturers is their lack of dedication to it. In Brazil, for example, most brands that ship with a Linux distro (except for DELL, which ships with Ubuntu) ship with basically digital waste (unmantained, poorly developed distros) just to make the hardware cheaper, because they know people will get it to just install a pirated copy of Windows in it.