Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some serious flaws

The sound quality is very good. That being said we have 2 problems. 1) it seems the parent units have to have almost a direct line of sight with minimal walls and doors between to get good signal. 2) if power is lost in the home the child unit does not turn back on automatically so both parent units will be beeping because they can't find the base. HUGE problem at 3am. For a tiny infant you can sneak in and turn the base back on, but as my son got older this was not practical. Very disappointing. We ended up just getting rid of the monitor. I could not even bring myself to sell it because the problems with loss of power were so bad I did not want to put another parent though that.