My family complains when the butter bowl is empty!
I've been using this now for a few months, and the family loves it. I either make butter from cream using my Thermomix®, or if I'm feeling lazy, I buy a block of butter. I find the trick is to whiz up the butter in the Thermomix® to soften before pressing it into the butter bowl. I use a silicone spatula to press it in firmly. Change the water every few days, and it's perfect!