One of my biggest pet peeves is grounds in coffee. Nothing to me spoils a great cup more that reaching the bottom and getting a mouthful of grinds. When I make a pot at work or home I'm obsessed with cleaning the filter bowl with water to rinse any grounds that came between the filter and the walls of the bowl. Whenever I have a professionally brewed cup it's totally unacceptable to have this--little things make a big difference in your enjoyment of a good cup!