The pictures I see on websites from using the lucisart plugin look stunning. How do they look when printed? Is any of the detail lost? Would the pics look as good hanging on the wall?

How LucisArt pictures look when printed depend on all of the usual factors- the resolution of your picture, the size you are printing, the color correction, and the quality of the printer itself. That is a whole separate topic from the LucisArt processing effects. So I can't tell you how the pictures will look when printed. It depends on how you print them.

I was wondering how many of you out there upgrade from lucisart to lucis pro. For that matter how many own lucis pro. I own lucisart, really like it, but wondering the difference I'd experience if I owned the pro. Pro is definitely a step up in price.