Works, but doubled our electric bill.
353656
It is quiet, gets rid of cooking smells quickly, and has a low profile. We loved it until we received the highest electric bill we've ever seen. Now we use it sparingly.
1220491
I bought this heater to reduce my Electricity bill during winter. I have a central heating system. I bought this heater to heat my living room and turn off the central heating. I used it for a month and looked at the Bill. The bill was about 25% higher. Then I checked online for the cost and during usage of this heater the electricity (kwh) was continuously higher.  I looked at the weather and temperature was very similar in the two months.
I have returned this unit and went back to central heating..I am glad the store took it back and I no longer have this electricity hogger.
4172910
my electric bill was $300.00 a month till I unplugged all things not in use, stopped using my dishwasher and changed all my bulbs to these. I also only have one light on at a time in whatever room I'm in and at night I use a battery operated night light led, and I recharge the batteries. My Electric is now $150.00
3574357
UPDATE: My landlord just called and my electric bill for January jumped $100. He asked me to unplug it immediately and I agree.  I told him I'd pay it if necessary, heat is included with my rent. I had really liked it but can't afford it.  Going to try to sell it or give it away.
560643
Paid $76 (shipping included - except for the postman requiring $3.75 COD for some odd reason - get it together Drills & Bills) and in the space of one month this thing more than paid for itself...reducing my electric bill by more than $125.  Nothing like knowing at a glance exactly how much it's costing each hour to power the various lights, appliances, and other electrical devices throughout your home in order to keep your monthly electric bill under control.  This thing even takes into account the overly complicated and borderline ridiculous tiered billing methods implemented by most utility companies for no other purpose than to daze and confuse your average consumer.  Thank you Black & Decker, good job.
312669
When it worked, it was OK, but it shorted circuits in my home.  Lots of money down the drain.
2323980
This is great, drastically changed the temperature of our downstairs. I cant say how much it alone saved us but we had new insulation put in at the same time (brought up to code from the 70s) we save $150 a month on the electric bill. You can definitely tell a difference, I highly recommend.
3706354
Works great - easy installation.  Be sure to turn the power off - potential short destroys the unit.  Still too expensive.
990171
we put em in the kids house ( with electric base board heat ) dropped 100.00 off a 400.00 per month eletric bill (northern  Illinois ) in winter time
2958839
Used this to diagnose an AC issue and find a few drafty locations to add extra insulation.
I'm sure it's paid for itself twice over by now just in electricity savings.
3193823
Worked good, but watch over heating/charging. 1 of my battery expanded.
1029738
We have learnt a costly lesson.  We now know not to buy electrical goods from USA and Canada as the the electrical system is different to Australia.  It will cost about $500 to $600 to adapt to our system.  It would have been nice to be informed of this when ordering.  As we  are not prepared to add this cost to our crepe maker, in the garbage it will have to go
1109003
Saved a bundle on my electric bill because of these Items 25-45% decrease in power consumption over all
4631276
Replaced all the bulbs in my condo and the electric bill showed it the first month
483274
This is a powerful, safe little heater, it heats up my 100sq ft office in my basement nicely, however, it has caused my electric bill to increase by $75 a month. So I can't say it is really greatly economical.
4513784
It takes up a lot more space than a regular power strip. I should have thought it through.
2843333
I bought the Nest for a new home mostly because the programmable thermostats in our last two houses had to *constantly* be adjusted. We've lived in the house for over a month and have only had to adjust the Nest a few times. For the most part it has been set it and forget it. I think the only reason we've had to adjust it is we had some major temperature swings and the Nest is still getting acclimated. With our last thermostats adjusting it was a daily occurrence, usually multiple times a day. I've only received one electric bill so far and it was lower than the bill at my last house. One of the reasons why our bills were higher before the Nest is that the thermostat was more reactive and seemed to cycle the unit on and off constantly. The Nest appears to be much more efficient because I don't hear the cycling on and off all the time. I'll be monitoring the decreased electrical bills and see how quickly the Nest can pay for itself.