Z-wave plus at its core is fine, the protocol is pretty well designed for home automation, and at least the chips I've used have been fine. Sadly the ecosystem

Z-wave plus at its core is fine, the protocol is pretty well designed for home automation, and at least the chips I've used have been fine. Sadly the ecosystem is a bit of a shitshow. Everything will work to some degree, but you'll probably end up spending an hour or two reverse engineering exactly how any given device communicates what its seeing, and what configuration is needed to avoid draining the batteries within a month or two. I'm cautiously optimistic for Bluetooth Mesh giving z-wave a run for its money but its still very early days.