It is a great feeling.
Last summer, I got ma'amed in full guy mode. I was only on HRT for 2 months, hadn't started my RLE yet, the only makeup was to hide the beard shadow, and was in men's clothes. I had my hair pulled back in a short pony tail, and the host at the restaurant looked at both my (then) wife and I and addressed us as "ladies."
Yeah, it's a great feeling.