A well grown Petra (there's the catch) can look phenomenal no matter how common the plant. There are a dozen or more plants that make collectors salivate but are hideous compared to Petra. It's the Queen Palm of the croton world.
Another hard one for me, Doris. Chris (pocomo) says its not slow but it has been for me. Perhaps I have left it in too deep of shade for too long. Got moved to an area with more sun about one month ago. Looks like it may be responding well.