We are very, very satisfied with the baby monitor. We have it for about 4 weeks use at home and at two grandparents. We have always had reception, even over several floors away, and in the garden. It happens from time to time that the device briefly loses reception. This is indicated by a beep and flash. But always it takes a few seconds until the reception is re-established. The quality of transmission is so good that you each babbling and talking (if mom or dad are just in the room) can listen accurately - like a mobile phone. Operation is incredibly easy. We also see very well that there is no separate power supply is necessary because the only unnecessary when traveling ballast would (as a unit we had before).