It supports all kind of zwave devices and they are very fast, much faster than native zwave dongle of c4 with fibaro dimmer 2 and much faster than vera. At the moment on my zwave js network which i run with home assitant i have Fibaro Single Switch, fibaro Double Switch, Fibaro Dimmer, Aeotec Nano Dimmer, Aeotec Smart Switch 5 and 6, Aeotec Multi Sensor 6 and Trisensor, Remotec Zxt600 and 120 Ir transmiters for Split AC., Danalock Lock POPP Keypad, Qubino Single Relay, Heiman Temp and Humidity Sensor, Heiman Smoke Sensor, Zipato Bulb. I think that i didnt miss anything , beside mqtt there is also websocket api. https://github.com/zwave-js
If you need someone for beta testing i’m available.