No zwave solution is. I opted for razberry since I have a raspberry pi 2. Everybody has gone after these ui's that are just a thin wrapper over the zwave protocol.
But honestly, until I get real flow sensor support, I have shelved my http device driver to the iro.
I'm hopeful that the zway guys get their HomeKit working again, but from what I have read that might require an Apple TV to act as the gateway.
And before ppl beat me up over using a raspberry, keep in mind, I have a portable power pack for charging an iPhone that acts as a ups and will run the device for 4 hours. At least I can still interact with my battery operated devices like my door locks over my backup ad hoc network.