Oh don't worry, I'm fine talking abt it to help out another trans woman! Also, I had 0 problem whatsoever being asked if I were on HRT (I'm very happy about my journey with HRT, but I know it's a touchy subject for some folks). I will say to make sure you measure hips and such for sizing, and use the LeoLines sizing chart, as they aren't standard sizes (I'm usually a women's small, but was an extra small in LeoLines). And yeah, they're expensive. I forked out the money to buy 10 pairs, and the only regret I have is that 4 of them were bikini, and I definitely prefer the breifs. They're machine washable with delicates and hang dry. They've held up really well for the 2ish years I've had them!
Also, I will say that I had issues with it not lasting when I used regular panties (not LeoLines). Wearing 2 panties layered helped a bit, but I still had to readjust occasionally. LeoLines are set and forget for me. The only time anything comes untucked is when I either take them off (like when I have to use the restroom) or when I purposefully move stuff (like I do right before I sleep to give my stuff the time to not be sweaty lol)