Instruct: Classify a review as either positive or negative.
Query: So far, so good.

So far, so good. Loud as can be when I first installed the battery or hit the Test button. Compact size (like a portable GPS), easy to wall mount. I mounted it in the hallway, an inch from the ceiling you don't even notice it.Price is good, but how do you really know if it works unless you take it down to the garage and run the car with the door closed for a while? In this case, if you go temporarily deaf, it works ; )I will assume it works, but if I wake up dead, I'm changing my rating to 1 star.