I think I would have got the Omicron booster weeks ago already ... if I hadn't caught a strain of COVID right about the same time as the shot became available.
Thanks to my earlier three shots, it was mild and over pretty quickly, but I have definitely felt out of breath more easily afterwards and I think my sense of smell hasn't recovered a hundred percent yet.
However, I've heard that the booster wouldn't be effective for more than three months. I'm thinking of waiting to get it when I'd need to be in more crowded situations so that it would have maximum effectiveness then.