Scalability, range, quality, wide range of color and keypad configurations. Integrates on to nearly every platform. if you decide that Z-Wave is not the platform you want to use in the future and you want to switch the zigbee for other stuff guess what Lutron still works. If you want to sell the house to Lutron caseta Hub stays and everything still works. I don't even do a lot of Lutron because I try to push control for and if you want to talk about expensive lighting talk about control 4 panelized lighting or keypad dimmers at $180 a piece retail