I've had it and don’t recommend it. The initial hit was similar to the flu (muscle aches fever) lasted about 24hrs but the brain fog was relentless. Since then (march of '20) my ambition, cognizant functions, sleep have all been negatively effected. Where once I could have a creative (complete) thought and then execute it now not so much. Even typing this I have had to reread to correct missing and incorrect words. I often find myself staring and my monitors, losing my words mid conversation and just being angry for no reason. It has ruined my productivity Its been an interesting (frustrating)14months.
Since having it I have had all three Vax's and after each one felt guilty for doing it...