No I havn't yet. I have the free Amapi 4.15 and I've tried v6. Amapi is cool, and has some amazing tools, but the interface isn't as workflow friendly as Rhino, Rhino becomes like liquid after you're used to it and know a few commands and shortcuts. But the new Amapi does look pretty enticing. One great thing about Rhino is the user base, it's huge, it's used in Auto design, boat desing, industrial design, and a ton of other areas. There are hundreds of plugins that allow it to do or be anything. It supports every file format known to man, and ther is more learning maerial for it that you know what to do with. I honestly can't ever see myself leaving Rhino. And Flamingo is pretty insane also, (renderer). But for three hnudred and some odd dollars, Carrara 3 is one hell of a bargain.