Great bookstore for those who want to read in English. The place was recently renovated, so it's…read moregot a great feel to it, with lots of light (perfect to read even the smallest fonts while browsing the shelves). The store's pretty big considering it caters to the English-speaking population, with two floors, and plenty of variety in terms of books.
The staff is extremely helpful and will help you find any book you want and even recommend you new ones (to that effect they also have a blog which they regularly update with events, such as book signings, and the latest book recommendations they have: http://waterstonesbru.blogspot.com/).
They also have a great rewards card system, which I recommend to anyone who's planning on being a regular customer there.
In addition, they have a fun selection of additional tchotchkes towards the entrance/exit, such as notebooks, pens, boardgames, etc, which reminds me of the Barnes and Noble bookstores you find in the US.
So if you want to read books in English, don't hesitate to check the place out!