Should I buy a K-Cup machine or one that brews ground coffee too?

It depends on your priorities. Across the reviewers we read, K-Cup-only machines like the Keurig K-Express and K-Mini Mate win on speed and convenience, while hybrid models such as the Ninja Pods & Grounds and Hamilton Beach FlexBrew let you use cheaper ground coffee and reusable filters. Pod-free brewers like the Ninja Specialty are favored by those who want to cut pod waste and cost entirely.