This is a nice meter, well built, nice buttons, measures volts, amps, power, time and energy usage for a single item.  It works, and the precision and accuracy seems very good.

However, it is big and bulky.  When you plug it into a 3 prong outlet, it covers the second outlet, no matter how you try to mount it.

And, it is hard to read, because the display is not lighted and can be upside-down if the socket is mounted with the ground on top.

Also, there is a 15-amp limitation.  So, you have to be careful what you plug into it on a 20-amp circuit.

And, it doesn't help at all with your biggest power consumers, like your water heater or dryer, because they're probably 220v.

This product could have been improved by making it pivot around the plug.  That would make it easier to read.  When I first saw the picture of it, I thought that's what it did.  It doesn't.  The circle around the plug and the socket is just decoration.

It could also be improved by making it smaller or trimmer, so that it doesn't block both outlets.  Or, even better, add a pigtail.  There's a lot of wasted space.

Even adding a small LED to light the display would be a big improvement.
This is a nice meter, well built, nice buttons, measures volts, amps, power, time and energy usage for a single item. It works, and the precision and accuracy seems very good. However, it is big and bulky. When you plug it into a 3 prong outlet, it covers the second outlet, no matter how you try to mount it. And, it is hard to read, because the display is not lighted and can be upside-down if the socket is mounted with the ground on top. Also, there is a 15-amp limitation. So, you have to be careful what you plug into it on a 20-amp circuit. And, it doesn't help at all with your biggest power consumers, like your water heater or dryer, because they're probably 220v. This product could have been improved by making it pivot around the plug. That would make it easier to read. When I first saw the picture of it, I thought that's what it did. It doesn't. The circle around the plug and the socket is just decoration. It could also be improved by making it smaller or trimmer, so that it doesn't block both outlets. Or, even better, add a pigtail. There's a lot of wasted space. Even adding a small LED to light the display would be a big improvement.