I bought this book for my Crim Pro Investigation course and I didn't read it at all during the semester, but I continued in criminal law and found myself checking it for the basic frame of caselaw on common constitutional issues.
The book itself is great for understanding basic rules from the Court, I use it to find the biggest cases before beginning research on Lexis or Westlaw.
I highly recommend the kindle edition for the utility of the search function and clickable links.