Recommendations for a Wallpaper Pro?

Has anyone worked recently with a wallpaper hanger that they'd like to recommend? I've searched the archives, but all the recommendations there are 5+ years old. The space isn't large—a hallway with lots of doors, so the actual wall space is not large. The paper I hope to use is complicated and expensive, however, so I want someone I can trust to get it right. I've hung wallpaper myself and I know just how tricky it can be. Thanks!