The exercises and background text are nicely done. Some exercises might ask a bit too much, in the sense of needing space, time, etc... for grandparents like me who watch two grandkids and get little down time. However, this is also the strong point of the book -- it outlines what we need to concentrate and focus and to escape the hectic daily lives we might lead. Not perfect but very nice.
I especially like the way the author included haiku (short, pithy poems and proverbs) beyond the traditional Japanese form that is more constricted and briefer. I've used some of them in a very popular issue of my Beter Conversations newsletter.