What's The Word?

As an interior designer, a variety of vendors snail mail and email me information for different products they want me to use for my clients.  One of many is Wall Words who specializes in wall graphics and word applications.  I am undecided on my opinion of using wall word applications.  I generally like them when I see them installed, especially in commercial settings.  It just doesn't come naturally to me to suggest to my client a "Live, Love, Laugh" application in their kitchen.  I do love a lot of the examples I see in the Wall Words catalog such as the floor to ceiling trees.  Here are a few examples:

What's your opinion?  Have you ever used wall applications like these?