i don't like Rosetta Stone, because i don't like sitting in front of the computer to study a language, which is tiring. anyway, it's just my opinion. i am using <<en directo>> which is a foreign textbook (published in spain), the reason why I am studying this book is because I can download the mp3 files which contain the teacher's explanation for each text, and the teacher specify each text in detail. I think <<Español Moderno>> is more systematical, and you can also downloan the teaching viedo from the net too. maybe you can try both, I think. :P

现在国内比较权威的就是《现代西班牙语》 外国语大学用的教材 缺点是，不太适合自学（有些语法点很集中，但解说又少） 优点是，很多西班牙和西方的文化方面的课文。很有用 还有配套的西班牙语读物不错 还有，自学不推荐，这门语言还是跟老师学好 自学学不出什么名堂

现代西班牙语，大学里大多用这个教材。

Rosetta Stone is the best. It is a software though. The best tool ever! It could even detect your pronunciation and tell you if it is right. http://www.rosettastone.com/