My husband has been wearing them for years and swears by them. Only for running though.
A few things that come to mind...
They are very expensive and they wear out really quickly.
You need to build up to wearing them for long periods otherwise you could damage yourself.
Wear them with the socks otherwise they will STINK, and I mean stink like a stink you have never smelt in your life. My husband really doesn't have smelly feet, but in those things, before he started wearing them with socks... oh my!! 😱(can't find the sick emoji!)
Also, I wouldn't have thought winter was the best time to wear them, even the "rugged" ones are quite thin, for obvious reasons, so even with socks, they aren't very warm.
Get used to people staring. It was my BIL who introduced them to my husband, he wears them just out and about because he wants to show everyone how edgy, cool and alternative he is.🙄 He wears them literally for the attention he recieves. I flatly refuse to be seen with my husband if he considers wearing them at any other time than actually in obvious exercise wear, obviously exercising. They are hideous! But then he does have several very bright pairs.😂