Before we go on I need to stress one thing: Black wallpaper is remarkably stylish if you choose the right pattern/design, this was a beautiful imported pattern.. However there are a few downsides technically - as well as upsides obviously. Truth is, seeing it´s a solid black, it´s likely to be very possible to see any other colored specs - in most cases only common dust. If you live in a city, be prepared to at least dust off the paper from time to time. The upside is if you´ve got contrast furniture, in this case white or so - it looks spectacular! Ages ago, an interior design shop in Bcn (DOM) had a very similar exhibition and I imagined my place decorated like that :-)
This was a 3x4m job, which I had to strip off the current fibre glass paper, scrape and smooth wall, plaster a few sections (which was obviously the reason why the builders chose to paper in the 1st place) and re-paper the wall. A great choice only doing one wall due to the color, as if more walls had been chosen - it would´ve made the appartment look very small. A record time of less than 3 hours to do everything in proper satisfactory condition.
"inner thought - I want my own wall like this..!"