MOBILITY: binding to the outlet. Personally, I still lack the usual mobility. If I sometimes fast out the trash or go to the basement, I can not hear my child. Well, we knew that when buying. Our little one is already 2 years old and there is no longer the so tragic.
SENSITIVITY: When our old device could set the sensitivity of the baby unit, here you can not. The device suggests probably quite late from, so only at a slightly longer and accordingly loud noise. My Little can go unnoticed open the nursery door (10cm next to the socket with the baby monitor) and make out of the dust, while the unit does not beat out. Uncomfortable when you see then down convert his toddler in the darkness in the sleeping bag up the stairs (or hears it cry until after the fall).
PARENT UNIT VOLUME: At the expensive Avent devices the low volume of the parent unit is often criticized what has kept me from buying. Here I found in this regard no complaints. But I also find this device in comparison to our old much quieter. At night, in the bedroom there is enough of course completely in medium volume, but during the day when you cook next or outdoors is staying (even if you're sitting right in the garden next to the device), you can ignore his child but easy, even at the highest volume.
A bit annoying is that the parent unit beeps as soon as the contact with the baby unit is lost or Zother is switched off. A clear visual indication (eg flashing light) would be better in my opinion.
Subobtimal is also switched on and off, because the button really long to press. Sometimes you press too long and it turns out the same again. Simple and plug it again is practical, because when you plug into the wall socket, the device switches on automatically. The night light function, we do not use. The coverage was for us has always enough, even with the neighbor over there we have impeccable reception. It has also been nothing broken, everything works like the first day.
CONCLUSION: value for money well if you can live with the smears (see above).