Which is the best beginner's Yiddish textbook?

The old standby Weinreich's College Yiddish is being used less now. Sheva Zucker'sYiddish: An Introduction to the Language, Literature & Culture is receiving more attention. Unlike Weinreich's book, it has an answer key. Volume 2 has been published. Marvin Zuckerman and Marion Herbst have a very good beginner's book also Jean JofenÕs Yiddish for Beginners. A truly excellent children's book is the new, Hulyet, kinderlekh!. there are older books like Der Onheyber by David Bridger. In my beginnerÕs class, I use Goldin's Yiddish Teacher. It has one major flaw--it does not use the YIVO standard transliteration.