Siddur Tefilloh Sefas Yisroel
"Siddur Tefilloh Sefas Yisroel began as a project to be assemble a comprehensive siddur which would be true Nusach Ashkenaz. Currently, this term has come to mean, siddurim better labeled Nusach Polin or Nusach Lita. Historically speaking, printers used this label fairly loosely in order differentiate them from Chassidic Nusach Sfard.
The world renowned expert in Ashkenazic Minhogim and Nusach HaTefilloh is Moreinu HoRav Binyamin Schlomo Hamburger Shlito, the head of Machon Moreshes Ashkenaz. With his invaluable assistance and guidance as well as countless others, I have been able to compile this comprehensive work.
This siddur has been designed to above all, be accurate and contain easy instructions. It will prove informative to both layman and scholar, and even those which have been utilizing a "Nusach Ashkenaz" siddur all their lives."
Rabbi Rallis Hermann Wiesenthal