Just a bit of side opinion working rf and some electrical, and fully understand if that was the best you could get, but some outlets are wired on different circuits. Also, some rf devices get overloaded if you're too close and that can degrade performance. Not saying that's definitively what happened, but you could have been either too close or further than you thought

I tried this once too and instead bought a big-ass SRS bit and went through a concrete wall instead.

Rock solid and reliable networking =)

(Repeating myself coz I saw this after writing my sibling comment..)

It's highly variable in my experience. I've had it work pretty well in some situations and barely at all in others.

I have certainly never got 1000mbps. I think I have got 300 at best. In my office I can only get about 50 even though it works pretty well in other parts of the same small apartment.

... Which is kinda annoying coz they aren't really all that cheap for something you have to just buy and then find out later if it actually works!