My wife brought a Keurig with her when she moved in, I switched out a kitchen faucet shutoff valve for a double dishwasher stop valve and plumbed a line through the lower kitchen cabinets with a shutoff valve and a flex line into the reservoir to make refilling a snap, and we use the refillable plastic k-cups. We grind beans with our Ninja spice grinder and keep them in an airtight jar next to the thing. Pretty much always ready to go. I hated the hassle of refilling the reservoir until I plumbed that line now it's no problem at all.