I bought into the hype and purchased a Topsy Turvy. According to the website-
Topsy Turvy® tomato planter works in a simple yet ingenious way. As the sun warms the plant like a greenhouse, the root system explodes and thrives inside the planter. Because Topsy Turvy® tomato planter is upside down, water and nutrients pour directly from the root to the fruit, giving you up to 30 pounds of deliciously ripe tomatoes per plant!
I have been keeping photos to show how well it works.
I planted my tomato plant on April 10th.