Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So far, it's good...it's loud!

Just received this the other day, so haven't had the chance to see how quickly it reacts when smoke is near it. Upon opening the package, it was extremely easy to set up & having the battery included is always a plus. It's small and simple! The testing button proved the alarm to be quite loud, it's 2x the strength of my current alarms. I originally just bought one to install into my guest house. I will be buying more of these to replace the ones in my own house!