As of 2015, professional testers' and consumer reviewers' complaints about Keurig coffeemakers include durability issues, two-minute waits to brew a cup, and "expensive" K-Cups. In December 2014, Keurig Green Mountain Inc. announced it was voluntarily recalling MINI Plus Brewing System K10 units due to a burn hazard during brewing.
According to the U.S. Consumer Safety Product Safety Commission, the recall of the K10 models the result of a burn injury hazard that could occur when water overheated during the brewing process and sprayed out. Keurig noted that this leak was more likely to occur when users brewed more than two cups in quick succession. The recalled units were produced in China and Malaysia between December 2009 and July 2014.
In addition, consumers who posted negative reviews were upset about what they considered to be a lack of quality control, resulting in the sale of defective units. Water pumps failed to work after a few months, or a few weeks, in some cases.
The most common complaint about the Keurig K350 2.0 Brewing System is the restrictive use of specially stamped K-Cups. Several Amazon reviewers noted that even Keurig's brand of re-fillable K-cups fail to work with this model.
Other reviewers had issues with not being able to adjust brew strength with Keurig products, and some pointed to environmental concerns of increased recycled waste using the plastic K-Cups.