I love my Keurig but this takes it to a new level.  Always wanted to be able to use my Keurig  and my select brew but was not able to until I found this.  Very easy to use.Very easy to switch back and forth if I wish.  While using your own brew, you will have to do some trial and error so you get your taste just right but this is the greatest thing since sliced bread.  Thanks Keurig!