This is not a thread to say I don't like them etc (although I don't) but just a warning. I met up with a friend this morning who is a surveyor. he used to renovate houses like me and today he told me that the current fashion for feature walls and wallpaper is being used to conceal cracks and defects and he has been to see a few!
Not saying you were Noddy, but it would just be really difficult to tell wouldn't it ?. A new house like mine you would probably be OK but something older you just wouldn't know why the paper was there.
I just think my friend saw 2 very bad cases after the fact both movement/subsidence! No way to prove it was concealment I would have thought but not sure. One was covering a crack between 2 houses he could put his fist in it was stuffed with cardboard and then sticky back plastic then wallpaper!