My need: Grandmother is in failing health and needs constant monitoring from multiple rooms.Pro's (for my needs): 8 hours of consecutive monitoring from 1 room. Microphone is extremely sensitive, this is an extreme positive for my situation as the microphone is sensitive enough to pick up faint wheezing while my Grandmother is sleeping. Loudness of speaker. On the loudest setting, even while I am sleeping, the speaker is loud enough to wake me up if I hear coughing or movement. Using radio waves for transmission. I am in a 5 bedroom house with a lot of internal walls. There is no issue with transmitting to any of the rooms. The call option rings loudly to all other units to alert everyone of an emergent situation. I have 6 all together. Plug and play. The units are easy to setup and learn to use. Just plug it in to a power source and set each unit to the same channel.Con's: Occasional unknown interference. I have tried every setting available and it happens on each. I've moved cellphones, landline phones, ceiling fan remotes, etc. Still has some interference occasionally. Albeit, not often. When the landline phone rings, so does every unit. When the monitoring mode is turned off for over a minute, the other units change the channel setting. You need to ensure that each unit is on the corresponding channel, after turning on the monitoring mode.For my needs these units are quick and easy to setup (plug and play) system. A great room monitor. Allows for instant notifications (as long as you are listening) offering me a faster response time to my Grandmothers emergent medical needs.