Good if you're new to the area and have no other resources.
Cons
Somewhat dated. Shows many variations of the same route and lists them as separate rides. Lots of doubletrack and dirt roads. Omits many worthwhile rides.
Verdict
A typical Falcon pocket guide with all the usual strengths and weaknesses. If you're looking for a good intro to the area, pick up Montana Singletrack from Beartooth Publishing instead. Although only 5/50 rides in the book are dedicated to Helena, it provides a far better introduction to the area.