More time consuming than other mediums especially to keep the joints tight. There is however no way to immitate the look of Natural stone!
Pavers
Usually manufactured but can be natural stone. So many really cool patterns and materials to choose from! We should at least choose two!
Concrete
Such a versatile and affordable medium. Broom finish it, stamp it, color it or break it up into sections. All great options depending on look or function you hope to achieve.