Personally I would not decorate like that. It can look cluttery. Fake greenery will look fake and can seem contrived. It collects dust. It's not for me and I have not seen any examples of it in homes where I have liked it being used around doors and windows.

I dont use them in my decorating. I do have a couple of silk flower arrangements though, dont know if they fall in the same category.

I like it if it's used in quantity. In other words, not just one or two strands, but 10=12" wide bunch, that way it appears more realistic.

I used to have a vine garland above my bay window and everyone loved it, but I realized it looked a little chintzy after I studied the look at my favorite store that had it there.