Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: If you are building from scratch, don't do it
Review: We keep replacing the model that came in our new construction. We have had to return this item 2 times because it kept sounding, even when new. Replacements end up working OK when you find the right one. The lates purchase came with a string of wires attached to a different connecting head. We don't need it b/c our house is already wired for this model, but it made me think that next time I'm going to look harder for a different brand and do some electrical work to change the attachment somehow. This brand is also very sensitive (which may or may not be a bad thing) and it constantly goes off in the kitchen area when cooking. It is sensitive to humidity, as well. The one in the master bedroom needs replacing the most, likely b/c of steam then dust build up.
