There are a lot of reasons to love Montessori materials in the home: they are beautiful, you can teach using just the essentials (don't necessarily need worksheets--yea!), they are "diagnostic," meaning you can observe a child using the materials and discover what concepts or skills still need to be developed.
Homeschooling with primary Montessori materials is also efficient because many of them can be used with older children (elementary level), too. They may be used in slightly different ways, as this article explains:
Montessori Nuggets: Primary Montessori Materials LIVE in the Elementary Classroom