The Upside-Down Tomato Project

I've seen this experiment tried a couple of times, I'm not sure if the results were too good, but I thought I'd try making an upside-down tomato plant this year. Take a large plastic bottle and a small tomato plant. Cut a hole in the top side of the bottle so that you can fill it with compost and make holes in the top to hang it. Wash all the soil off the roots carefully.
Roll the root ball in a small sheet of paper so that you can slide the paper tube (containing the roots) into the neck of the bottle.
You then fill up the bottle with compost, and hang it upside down.
It looks a bit sad at the moment, it might take a few days to recover from the shock. I chose one of my cherry tomato varieties Ildi for this experiment. Has anyone tried this before?