I used this book (when it was written by Mary P. Dolciani) in 1973-74 as a junior in high school and loved it. The recent revisions continue the excellence of Dolciani and the series. The theory is sound and the examples are easy to follow. Especially important is the numerous exercises graded in difficulty that help the student master the material. This book actually makes students THINK and does not spoon feed the material.
I can't say enough great things about this text. My school district uses this text for the honors tract (9th/10th grades) but uses another text for the "regular" 11th grade Algebra II sequence. I feel this is unfortunate because all students can benefit from the rigors of this book.