I've seen them. I've also seen the price on them. I've seen some in the five to six foot height. While I like the colors and wire dimension, I'm not interested in using them for garden decoration. If they would make them unpainted, but the same wire size for a cheaper price; I would probably use some. I wasn't sure if they are painted or powder coated. If they are painted, the paint will start peeling off quickly in the wet environment of a garden. If they are powder coated, the coating may chip a little, but last for a long time.
I do have some determinate varieties planted this year that simply will never grow tall enough to fully utilize the trellis they are growing on. They would probably perform better in one of the smaller cages you describe.
I simply enjoy gardening!