Acer executives have criticized Microsoft's decision to build its own tablet in the past, but now the firm's CEO has offered Redmond a more direct warning. "We have said [to Microsoft] think it over," Acer CEO JT Wang told the Financial Times. "Think Twice. It will create a huge negative impact for the ecosystem and other brands may take a negative reaction." Microsoft has acknowledged Surface's potential to frustrate its OEM partners, telling the Security and Exchange Commission that competing directly with manufactures might "affect their commitment" to the firm's platform. Not only does Wang agree with this admission, he seems worried that Microsoft will cause this damage for nothing. "It is not something you are good at," he continued, "so please think twice." Polite, but a bit bold. Then again, Acer has never been shy about telling Microsoft exactly what it thinks.