Disclaimer - I am by no means an expert on devices this is just my experience with these devices.
Installation/pairing etc - was seamless and painless using @markus drivers a far easier experience then what I have had adding Zwave devices
Range - again excellent I have one contact sensor on a shed door and with a centalite plug inside the house and 20+ feet from the outside wall and it just works.
Speed - very fast detection and activation
Accuracy - temperature reports with in half a degree Fahrenheit of a standalone electronic thermometer so good enough
Battery life - No idea I'll let you know in 3 to 6 months I suspect
Value - off the charts bang for the buck is great
I hope this helps anyone considering the devices and again thank you @markus for the great drivers and support
