This made my wonderful Green Mountain Sumatra Reserve the weakest and wateriest coffee ever! I used french press coarse ground AND medium ground and both were weak and watery. Also I have always used the same setting with the K-Cup of the same flavor and got a perfect pour of water and with this filter I got a less amount of water and it was weak and watery, that's pretty bad. Not happy, trying to use less plastic but just doesn't work effectively or well at all.