I began doing installs just over a year ago. By now, the bamboos planted have matured, and have created the "wall" type effect that most of my clients are going for.
Pictured here: a Modernist home in New Orleans' Garden District. My client's property line was separated from his neighbors' by a 2' wide gap between his patio and their home. Bamboo was a natural choice for providing privacy here, both for the sake of maintaining the home's aesthetic, and for the fact that it's effectively a 30' high fence.