I have two of the six high sideways sterilite racks. I love 'em. Like Christie said, I got enough extra tubs to go 24 small or 12 large in each one... so in case they discontinue the tubs, I have plenty. It took my first rack about 4.5 weeks, the second one took a little over 7 weeks. In another 30 days or so, I'll be able to tell you about stackability, but I have the two racks in differen't parts of the house now.