I am not a fan of plastic tomato supports, and this proves the point. I was sent this to try out a few years ago, and I cannot for the life of me remember the name of the company that makes it. Anyway, I think I did give it a try the year it arrives, but given how tomatoes tend to fail in my climate, it didn't get much of a workout. So I got it out in hopes of using it to support this year's tomatoes–and look what happened. One firm shove into the soil (not into rock, just into firm soil) and it broke.
So much for that. What are you people using for tomato supports?