I purchased this to replace a 2 tiered (Vented style canopy) gazebo.  Because I live on a lagoon the gazebo is in constant sun and being on the water brings some strong gusty winds which pretty much tore the old gazebos canopy.  I believe this type is a better fit for the location being more aero dynamic for the gusty winds.    Definitely a 2 person job to put together but well worth it.