So glad no false alarms. Great price.
933063
We bought a different Kidde product and it would give us a lot of false alarms. We have had this for months now and have not had the same problem. I gave it 5 start primarily because of the ease of mounting and the fair price.
154319
This alarm is great and worth the price. The vibration is strong, the beep setting is loud, and the flashing light is bright enough to definitely wake you up. Easy to set and the snooze button is in a very convenient spot. I like the design of it as well, and can be used for travel or for home.
1434395
This is my 2nd alarm unit, the 1st was not a Guardian. The Guardian was much easier to set and install and worked instantly.
My only suggestion is that they have a setting to make it louder.
And I love that they followed up to see if I had any questions.
One of my reasons for selecting the Guardian was their Lifetime Warranty.
361066
great price for this combo alarm. High quality, easy to install.
333321
Simple to order and set up. I feel much better having the alarm system installed in my home. I installed it myself in about an hour. It is also easy to expand the system as my needs change. I even added a sensor to my shed should someone try to break into it. Great price and a great company to work with.
932241
I bought these for our new (older) home to bring it up to latest code after researching on Consumer Reports, The Wirecutter and NFPA. I came to
Same conclusion as The Wirecutter and NFPA - we shoud get different types of alarms for different areas of our home.

I purchased six alarms and had them installed in about an hour, with an extra pair of helping hands to pass off tools. The instructions for syncing and installing the alarms was straightforward and easy to fix when I missed a step. Every test passed and we feel reassured that we chose a good product to alert our family should the unthinkable happen.

Once we install a couple of ionization sensor alarms, we may get a couple more of these if needed.
3602279
I was replacing the older version and this one plugged into the existing wires.  Had to remove the old mount from the ceiling and install the provided mount.  Easy install.  No false alarms after 2 months.

installed Lithium Ion 9v batteries, so I won't have to mess with batteries for 10 years!
4745039
I am so glad that I ordered these security alarms and they do make a noise. Now I feel secure that they are installed - and they are very easy to install.
742507
Good functional alarm at a great price.  It serves as a deterrent.  If someone really wants your bike no alarm will stop them.
2014260
We have a freezer in the basement powered via a GFCI circuit located in the garage. Odd. When we moved into the house, the GFCI had been tripped. (It took a bit of forensics to figure out where the GFCI was - circuit breaker was fine.) f this occurs again, our frozen food will have bought the dust. Bought this little gem and we instantly know upon entering the garage that the freezer is in good stead. Loud alarm and light provides the perfect safety alert. Problem solved! Cant go wrong for the price.
3385077
Great alarms.  I installed one each on the front and back doors and all openable windows in just seconds after installing 4 new LR 44 button batteries.  The 120 dB alarm is enough to be heard throughout the entire house.  Low battery test button.  Choose alarm, siren or chime when door or window is opened
1554002
Very happy with this alarm, I have sensor distance adjusted to 23 feet and it has been very reliable with no false alarms.
3779709
Great alarm--very reliable.  Must have for any area that could have unwanted water.  Cheap insurance. Fantastic value. Easy to set up and has very loud siren.  This is the one to buy.
3823730
I am very happy with the Nest Protect system.  The fact I can both check anytime that the alarms are working and also do a test to see if working were the selling points for me to purchase the system.
1834295
I've read some other reviews about these that stated the batteries would need to be replaced ASAP or be DOA.  I didn't have this issue.  Ours is up and working with the batteries it came with.  Hubby managed to set it off burning some food the other night.  It was very easy to get it to shut up which is a big plus over our old alarms.  The reset function is very nice to get it to stop with the nuisance alarm for things like burned food setting alarms off.

My only issue is probably more of an issue with amazon themselves on this one.  When we received the package all three alarms were loose in the box where the factory packaged managed to come open presumably during shipping.  This is assuming amazon wouldnt just toss opened alarms or alarms with loose packaging into their shipment boxes.  We had one missing battery which Im pretty sure  I have contacted Amazon to fuss about and never got a response.
540010
Worked as directed. Happy with my purchase and fixed the false car alarms.
1494358
When we moved in our house, all the bedrooms didn't have fire alarms.  I want each bedroom to have one, so I searched Amazon for a good battery operated alarm.  The reviews were good for this First Alert one, so I bought a few.

They were easy to put on the ceiling.  The batteries are easy to change.  So far we haven't had any problems.