It took me quite a while to knock these off since I only did one lesson a week with a teacher on this book. (I'm also busy working my way through Chinese Made easier - book 1 and 2 done, halfway through book 3.) I feel a sense of accomplishment having stuck with the BASIC series consistently and finishing the Spoken, Written and Practice books. I think it's a fantastic set of books and found lots that has been useful in real life. I also found it to contain quite a bit of language that I haven't come across in other places and even enjoyed some of the more "dated" vocab. The books ( especially the practice book) feels like a somewhat modernized version of FSI. I am now going to begin the Intermediate level books of the same series.