punted a bit in hk. wgs available in every neighbourhood, although tst seems to be the most abundant. all comms are easy to arrange -- just do over whatsapp, and you can get pics up front too. the variety of services on offer is also very good: everything from real nuru massage, to various spa type activities, to thai massages, to hotel walk ins, and walk ups.
hk's density and size means everything is always 15 minutes away by subway, on foot, or taxi. it's a den of iniquity really.
range of girls is also very good, although i would say the main categories are mainlanders, thais, russians. tried all three with mixed results: two very hot wgs (hunan and russian), but only one gave good service. the rest were pretty perfunctory, not gfe experiences at all.
price wise things are pretty good -- about £80-120 for the standard 45 mins session. i think a luxurious nuru spa experience, which includes full service, was listed at £160 for 90 mins, but i didnt get a chance to try.
overall, highly convenient, and you can probably increase your chances of getting good service if you're a regular punter there.