Z-Wave stands out because many of this devices can act as repeaters and extend your range. They also offer security which others do not. They also work really well but can get really expensive.

You're looking at 2-5x the cost of a Zigbee device. Zigbee is not without it's problems but I've been able to solve mine with $14 repeaters while my Z-Wave problems have complicated solutions and still might be solvable.