I found I had to wear the bra for a couple of hours for several days to get used to it as it pulled me into quite an upright position and I wasn't used too it. And I thought I had pretty good posture!
Now I'm used to it, I love wearing it as it provides excellent support, comfort and fit for my equestrian sports.
I am a G cup so need all the support I can get.
BTW my husbands reaction was " you look fantastic!" so a big plus from the man in my life!