I've used the alternate pods with no success. Often they are packed so tight that the coffee just dribbles out and, without exception, I need to use a spoon to pop them out of the machine after use. The taste is also not as good as the original and the only advantages are price
and since they are 100% biodegradable one can chuck them overboard
while on passage
without having to worry about breaking MARPOL rules.
I just stock up on pods whenever I hit a French island and my suitcase is full of pods when I fly back to the boat from Europe
so I have a steady supply for my coffee addiction.