So far it works great. You plug it in push a button to ...
340990
So far it works great. You plug it in push a button to pair headphones and now I can listen to tv through my Bluetooth headphones.
2580092
It's great for the price, and actually it's more than enough.
I have no problems using it, just plug it in and start right away.
3396821
So far it is wonderful. It has a slight click when coming on and shutting off and that is it. I use it to power a hot water recirculating pump to get water hot to the bathroom sink. As soon as I enter it clicks on and I can hear the pump whirring a little. When I am done with my business the water is hot. When I am not in the restroom the water pump can not turn on so I am not heating water in my pipes unnecessarily. What a good combo.
1338711
I haven't put it on my car yet but I have tested it in the house and garage. It works great so far.
103835
So nice to be able to push a button. Wired to main power behind disconnect. Works great for my little microlite.
4055373
Works great so far.  Will update with a fifth star if it lasts for the long haul.
920398
it works great so far. I'm very happy with it. Be sure to convert the temperatures listed on the info sheet to Fahrenheit or things won't work right. Also be sure to let it cool for a couple of minutes by putting the temperature down to 90 before shutting it off.
775384
No problems with it so far. The built-in micro USB end for devices feels quite cheap and likely to bust soon, but hasn't yet. I get about three charges of my phone while using it (Moto G), which is about what I expected. The button/power state stuff isn't perfectly intuitive and is probably why so many people with tricky shift keys think it doesn't work at all.

I'd have given it five stars if it plugged in to the wall or even just came with a wall wart. As it is you'll have to find a USB power source yourself to charge the battery.
3791018
So far so good.  Just got it a couple days ago and it works great thus far.
1265991
Works Great! I like it because when you push the doorbell button it lights up letting the person whos pushing it know that its working. And, the bell inside the house also lights up. Thats why I just ordered two for my deaf brother so he can see the doorbell light up in his bedroom and living room.
2835102
We love this so far. We haven't had a chance to use it a ton yet, but it works great. the only thing we've noticed so far is that the voice has about a 4 second delay, so hopefully that isn't a big deal. Also the cord is pretty short, so hanging it in the top corner of our nursery, we have to connect it to an extension cord and it's a little obnoxious. But that's somewhat minor. :)
3987940
I have only been able to use it for a short time,  but so far it works great.
2187109
Sometimes I have to push the Set button several times, but then it takes off and works well.  No problems so far.
4180076
Just installed it so I can't review the longevity, but it does come with a wiring harness and push button switch.
1959308
This push button along with the wireless doorbell has worked very well for several weeks.  Doorbell can be made loud.
1849657
Works Great so far. Love how you can move it with the back up battery if needed.
1564536
It works great. True to size.  You can press and use all the buttons through the plastic face. The plastic part makes it a little stiff on your arm, but secure at the same time. I have no complaints.