OP, ignore a lot of the nonsense and bullshit that's derailing this thread and let's get back to an objective analysis of your initial question.
Is she "worth" $500? That's a question without a simple answer, unfortunately.
I'll say this...if and when she decides to retire, or if she happens to raise her prices in the future where it's beyond "worth it" from the current $500, you'll regret NOT seeing her.
Sure, she started off at a mid-priced spa, but she was heads and shoulders above most normal staff, and quite a bargain back then. She's since developed a following and subsequently increased her price, but not to the point where it's ridiculous for her looks, service, and attitude.
If you compare her purely to other similar looks and service indies, her rate isn't actually too bad...I think she could command $700-$800 if she wanted to. And with KG and other places now charging $420 or more, her upcharge is pretty reasonable.
She's one of the few Asians who is smart and capable enough to sort of branch out on her own, which is a testament to her grasp of the English language, marketing and savvy, and self-awareness, without pricing herself out of reach for many. She is adaptable in her sessions, and has the sense to take it to a place of your choosing...or, you can just let her lead and totally be in her control.
Yes, she's had work done and if you're not a fan of the Asian Barbie-doll body, she might not be for you. But her face is quite pretty, and her proportions and ratios are very aesthetically pleasing, and her attitude and service are top-notch. She certainly has her quirks, and she's not a 20something, maybe even not a 30something, but she has the rare combo of looks, service, and attitude, and if she can't get your motor running, you might have some issues. She's also actually quite sweet, if you ask me.
Ignore the dudes who say she's "overpriced" at $500...those dudes generally pay $300-$350 for most of their sessions and $500 is a stretch for them. And if that's the case for you (which is totally fine too), so be it. But if you have the funds, definitely go for it.
So for me, she is at least a one-time must see, only if the goal is to see a potential legend in the making. Easily.