The reviews I find most helpful take you on a journey from arrival through departure, so you share the experience of coming in, describing the environment, meeting the MMS and provider.
They are selling skills and services: young, attractive women accurately photographed with promises of a GFE - if that's your thing - with possible sexual submissiveness, TS, PM, TS, BBBJ, DATY, DATO, and/or whatever can be asked for or implied being offered with great skill. And a massage.
Your report helps others pre-visualize / fantasize what they might expect for themselves. For example, if you like kissing, then look for LFK or DFK and her level of enthusiasm and expertise. If you like privacy (what are you doing here, then?), look for real walls and doors in your room. Table or Standing Shower? Air conditioner?
Did she offer you a drink? Was she cheerful? Friendly? Speak any English or use a translator? Was it a quiet or noisy place?
All things you'd like to know. Along with the related costs (donation and tip).