It’s a classic look. I say go for it! I love a lot of the options you can find at Spoonflower, but have not used them myself. I have lots of wallpaper from other sources, though.

I find the small scale of the wallpaper pattern seems to fight with the floor. If you like light and airy, I suggest you simply find a larger scale wallpaper.

I think your wallpaper selection should be a stronger statement.

You can take a photo of your bathroom and 'try out' different wallpapers on DecoratorsBest.com See examples below.

I understand the allure, though frankly, I wouldn't want to have wallpaper in such a humid space. It is done all of the time, there are papers that work for it, this is nothing new. And still, I'm so in love with paint that I think your bathroom could look everybit as gorgeous with paint. Save the wallpaper for a powder room instead.

Those border from the 1970's must have used superglue to attach them to the walls! I remember my Dad spending days removing a border and paper from the house they bought in 1980. It would only come off in small ripped pieces.