I started just a few (about a dozen) from "versa mix" seeds. Like all seed grown ones, they're pretty slow. A few grew faster and I took a cutting from them. I only planted a couple of them in sun and they're not doing well at all. Maybe they weren't hardened off enough, but I thought they were. The watermelon are a pretty color but do seem wimpy compared to the others. A few of the lime green color grew best. Burgundy to green is pretty good, too.
One strange thing is the way they change color. Weird, but fun to see them change, too. The crimson started with a bright green border which is just now turning yellow. The cuttings I took, younger plants with smaller leaves, looked different from their Moms. Now I'm not even sure which color they'll be because they change so much. I'll try to get some pictures soon and post.
Overall, I guess I like them. I had started some coleus from seed in the past so I wasn't expecting them to take off like cutting grown ones. Too soon in the season to pass judgement but they definitely show promise, at least in shade or part shade. Definitely cheaper than buying cutting-grown ones, that's for sure. Full sun here? I don't know yet but it's not looking good so far.
Karen