On the 10-cup side the opening for the water reservoir is too small. So when I go to fill the reservoir the initial aim usually misses and I splash water all over.  On the single serve side in the k-cup compartment the top needle does not puncture the seal on the k-cup so I have to use the accessory cup to make my single cups.  My opinion is that it is way too much hassle for the price, especially when it’s early in the morning and all I want is a cup of coffee but instead I have to clean up a mess before I get my cup of Joe.