I have boughten and used several different brands of grinders and have never felt the way I feel with this Kannastor. The flower is grinded into a perfect product. The finished product is not to fine and will allow you to enjoy a bowl with out worrying about air flow in the bowl piece. I love being able to buy replacement screens and will always use a Kannastor grinder from now on. Thanks 420 Science for stocking the best and being great. Keep up the great work and cheers to everybody