I bike commute, road, and using my fancy road bike shoes in the cold is annoying. Shoe covers work, but let's face it, a pain to get on and off. If you're going out for a long ride, have time, sure thing, no issue, shoe covers aren't so bad. Every day at 0400, nope, annoying.
I found these and caught a sale. Sidi stuff is expensive, it works, and if it fits you, holds up very well. The high-top style takes a bit to sort out, it's not bad, you're just used to your ankles moving and being exposed more, so this was odd at first. Not a big deal now. And they go on and off fine, straps and dial work and click down hard, no messing around.
I've had them down into the 20's with no wind other than riding produced, and was actually warm, my feet were actually sweating, but i wore a thin merino sock to be safe. I've also had them down into the teens with wind, and same deal, so they do a good job keeping the heat in your shoe. No shoe cover either, just the boot and a sock.
I think the Gore-Tex is a double edged sword, they don't vent super well, but they keep heat in, so if you'd rather get warm/wet from within, vs cold/wet from outside, it's fine. I've had them wet too, the high top seals up okay around your leg and leg warmer, but if it's a downpour water does get down in there. Not a ton, but it does trickle.
If it's just wet/splash stuff, you'll be dry for sure. And if you get them covered in grit, hose them down right when you get home.
They don't come in half sizes, I was fine with it because for a winter shoe, I'm not planning on an epic ride with them anyway so don't care. I've used them up to 3 hours and they're good for me. I did throw a G8 insole in them, as usual, zero arch support.
If you train/commute in bad weather, and they fit you, I don't see a reason to not add these to your weather. If anything, the time you save wrestling on and off shoe covers is worth it alone. One less thing to deal with is always nice.
And as reference, I'm about to ride home in 22 degree weather (Fahrenheit), with a 20 mph headwind, and other than it generally being annoying and cold, my feet will be fine with these on and a merino wool, thin, sock. Can't beat that security.
Thank you for your feedback.