Kobo Vox eReader

Does anyone know if the Kobo Vox eReader work in the UK if one if purchased in the US?  My mom asked me if I wanted a Nook Color, but I know that won't work outside the US because it's linked to a Barnes & Nobles account.  I know that WH Smith sells the Kobo Vox as well as Best Buy in the US, so I wonder if that would be a good substitute for the Nook Color.

I have a Nook reader and I use it just fine. We downloaded a programme called calibre to transfer books from the computer onto the Nook. Downloaded books from a site called ePubbud....

I have a nook color and I have been able to buy books from the Barnes and Noble site to download to my Nook here in the UK and haven't had any problems at all.