This is the most popular edition of the vocal edition of this choral masterpiece - and will be used by many choirs. It's about A4 size and reasonably thick - but this makes for a compact package, for a whole concert of about 90 minutes.
There is a handy contents page which gives you page numbers for all the movements and an english translation of the text. The musical notation is evenly spaced across the page and consistent throughout, which makes for easier reading, when singing.
Probably the best edition for use by those singing this in choirs and has guidance as to when to stand and sit, as well as clear dynamics markings.