With its crisp laser printed pages, extensive commentaries, and long essays on different liturgical oddities, it is not surprising that the Vilna Siddur is incredibly popular in the Yeshiva world. In the Lakewood and Chaim Berlin study halls, for instance, the Vilna is the most prominently featured and used siddur.
The Vilna siddur has a filthy, dirty little secret. The person who put it together was none Moshe Hirsch. Hirsch is a prominent Neturei Karta activist, the and a certifiable asshole. Though he put it out in his son's name, Hirsch did most or all of the legwork in writing the commentaries and scouring the prayers for the aforementioned liturgical oddities.
Hirsch is an asshole, don't use the Vilna siddur.