I have had 2 sets of these refillable pods. The first set worked well. I did have to leave the coffee set for a few minutes as these pods do allow some ground through. I would pour the coffee from the mug I brewed it in into a travel mug and simply leave the dregs in the bottom of the glass mug. After about a year and a half, I needed to replace the pods.  The second set is terrible. The top frequently pop off the pods leaving a mess of coffe grounds in the mug and inside the brewer. Not what I want to deal with at 6am.