I have large zwave AND zigbee networks. They're very equivalent. I find that the hub is the important factor for ZWave where as each device is important for Zigbee.
Since ZWave is licensed and controlled, I've only had issues where (actual example) a siren supported playing multiple tones but the hub didn't support that particular feature directly.
My experience with Zigbee is slightly different. Being an open standard there are lots of cheap choices however it also means that because there is no licensing to use it, not all of the devices branded "zigbee" are fully compatible with each other. My personal experience leans more towards "Pair the device and cross my fingers that it is compatible". If it's not, nothing works.
Otherwise; They all use the same basic tech (PIR, Resistance for water sensing, magnets and reed switches for door/window open closed) so it really comes down to implementation.
Since ZWave is licensed and controlled, I've only had issues where (actual example) a siren supported playing multiple tones but the hub didn't support that particular feature directly.
My experience with Zigbee is slightly different. Being an open standard there are lots of cheap choices however it also means that because there is no licensing to use it, not all of the devices branded "zigbee" are fully compatible with each other. My personal experience leans more towards "Pair the device and cross my fingers that it is compatible". If it's not, nothing works.
Otherwise; They all use the same basic tech (PIR, Resistance for water sensing, magnets and reed switches for door/window open closed) so it really comes down to implementation.