Yep. Add me to the tally. Only encountered one so far. It was when I was living in SE Asia years ago.
It was at night while I was sleeping alone. Woke up floating face down in the middle of my bedroom, more toward the back, and near the ceiling. Entire left wall of room was "missing", so I could clearly see outside. There was also a strange, unknown light source originating from the front left corner of the room, illuminating everything.
And then I saw "it."
Seven-ish feet tall, standing just outside. Body was bilateral (two arms, two legs), but "cloaked" in a sort of "undulating, roiling smokiness," similar to what a number of other people have reported. LARGE, red glowing eyes. Didn't make a sound. About a second to look at it and then I went into "fight or flight" mode. Then I was "out."
I have reason to believe it was using time-altering tech, too.
The whole scenario transpired in only a few seconds.
It all seemed more like an actual abduction, than a nightmare (which I get extremely rarely).
The next morning I went outside to inspect the ground where it had been standing but the ground appeared to be undisturbed. So, my take is that these things have interdimensional capabilities.
Other things happened which are possibly related to this. Too much to go into here...
And that's just for starters...
Here's a link to a short YouTube video some kid made a while back (altho he depicts the eyes with lighter centers and red only around the margin. The one I saw had large, wide "oval"-shaped eyes, like you'd expect, except they appeared to be uniformly red throughout, and glowing like semi-bright LEDs):
Creature with red glowing eyes!
Yep. Saw pretty much the same thing. He's not larping (and neither am I...).