Keurig coffee maker makes a good tasting cup of coffee, however, I always wind up with some grinds and sludge in the bottom of my cup.  I’ve tried many different ground settings on my grinder.  This only started when my old Keurig broke down and I updated to the Keurig 2.0.  Also the tops of the reusable filters break after about a year of use. I’ve had to replace three.