Kokoro and carpenter are the same thing?
YunTi or however its spelled is just a high quality L1 place. If you were around for D&T its a very similar vibe. Lowkey some of the ladies might be interested in L2/L3 but it'll be an arm and a leg. They seem to rotate through the ladies pretty fast too so the chances of building a relationship with someone is hard.
The most important thing to remember that no one wants to admit is YMMV. Ladies are gonna be more happy/euthanasic if you are handsome and generous. A lot of people have sky high expectations but cheap budgets. A shocking number of people will refuse to admit that they don't have the greatest personal hygiene. And finally, about half the reviews on this website are written by simps and promoters. There's never a bad review from these guys, every lady is a supermodel in their mid 20s who doesn't watch the clock!