@taedryn Had my first visit at a proper dessous boutique with a (cis) friend of mine. She dragged me into her favorite shop (Rigby & Peller). I had a real bra fitting. I thought I'd die in that cabin 😅
But they were so lovely. When Rebekka later visited the shop again, the manager asked her to give me her regards.
Me: "I seem very have made quite an impression."
She: "Sure you have. 😏"
So my tip is to find a small shop with a good reputation. It's a difference like day and night.