Is Powerline networking really that good?

I am thinking of adding a computer upstaires in our house, but the router is downstairs.

I was looking at Wifi, but I found this Powerline network system which seems cheaper and more stable.

Looks really good, no new wires, just plug one into a power plug near the router (correct?) and the other on plug in a socket near the computer.

Seems like a simple set up, and they say 500 Mbps which seems fast, good enough for gaming (right?)

Look like there is a lot to choose from, but some are HomePlug certified, and some are not.

What is this HomePlug certification, is it important?

Is HomePlug certified faster?

Anyone using Powerline, and how do they like it?

Belkin E2D3500. Plug and play, fast, more stable than WiFi, ... no complaints.

According to http://www.newegg.com/Product/Produc...82E16833314091 you still need a Router. See "System Requirements" under Spec.
I know YellowDucky1981 has one, but I mention this for others who may read this thread.

homeplug certification: https://www.homeplug.org/home/

On some powerline adapters, one of the devices can be a router, so a seperate router might not be required.

I use the dlink powerline av 500 and they are, also, excellent.