We just recently started to use the solofill cups for our Keurig OfficePro coffee machine. We had been wanting to try them since December to save a little on the cost of coffee as the K-cups can be a little expensive. Unfortunately every time that we checked the manufacturer's website they were out of stock. We were finally able to get a couple to try. The initial cost was somewhat expensive on top of the coffee machine itself. Also, when we selected the coffee, we were cautious as to not pick anything with too fine of grind as the mesh on the solofill cup is quite fine and we had read other reviews that "fine" grind coffee tended to plug the cup. The initial trial of the solofill cup was very satisfactory. It worked just as well as the K-cups. The only con was the clean-up afterward which was somewhat messy. If you don't mind the extra cleaning and like the option of selecting your own coffee, then these are well worth the extra cost. They fit well in the Keurig OfficePro coffee machine and over the long run, should save money. Would definately recommend.