I just went and checked their website and you’re right! I think the biggest problem with VS that I’ve seen is the training (or lack thereof) of their fitters. I haven’t been to a VS in years since I sized out of their bras like eight years ago, but from what I’ve heard in the past their in store fitters used the +4 method. They may be responding to criticism and changing that, which is great! They even have an accurate conversion chart on their website, which is a breath of fresh air, even if it only covers their very limited size range. (My last experience with VS was several years ago, I was shopping for bottoms and someone offered to help me find matching bras. When I said that they didn’t carry my size, she looked confused and offered to fit me like she didn’t believe me. I told her my actual bra size at the time, 30H, and she promptly left me alone haha.)
I’ve never personally ordered from HerRoom, but I think they’re recommended fairly often because of the size range they carry. HerRoom’s band size chart is actually exactly the opposite of what I would use haha. They recommend going up in band sizes if your measurement is small (presumably because they don’t carry 26 bands) and using the measurement if you band size is large. I’ve seen that smaller measurements often need the smaller band for snug support while larger measurements often need to go down for the support and because of things like squishable flesh.
I think that HerRoom’s lack of emphasis on the measurements and bra fit checklist are what get them recommendations from bra bloggers though. I know a lot of people are in the “throw away the tape measure” camp and HerRoom seems to put more focus on the measurements as a starting point.
I’m super hopeful that VS is getting their act together though! If I were in their size range I’d go test out their fitting service to see if it’s improved at all.