I am also using both. Both have good and not-so-good aspects. I'm sure you'll find plenty of people on the site to tell you what a wonderful book "Latin for Beginners" is, and how wonderful and excellent and marvelous and incredible Dr. D'Ooge is, so I'll refrain.
Instead, I'll say that the Collar and Daniell book is really fun and easy, and I like it a lot. (I'm not saying that the same doesn't go for Latin for Beginners!) <br /><br />Also, reading the same rules twice really helps to fix them in my memory. Then, too, on any given day, the vocabulary is different, so you can learn twice as much, so...<br /><br />I can agree with not having a "neither" option, but maybe you should have a "both". (Although it might look funny without a "neither".) <br /><br />Anyway, my vote is "BOTH". ;D<br /><br />Keesa