I was traveling to KL quite frequently earlier in the year and used a few agencies. Some pointers and things to know about escorts in KL:
1 - Girls are afraid of the police so will not come to your hotel alone and driver/boss will call to verify info. Recently have heard police have been cracking down so some girls do not want out-calls any more. One Thai girl I spoke too got caught once and she said you spend 2 weeks in prison, very dirty, crowded, and police use you as they want there.
2 - Police only target women and I have never heard of a man getting in any trouble.
3 - Of the 150 RM you just gave the girl some goes to the driver and half to the boss so in the end the girl does not get that much. Always tip your girl and let them know it up front. Many people in KL do not tip so if a girl knows you will tip her for good service, you will get better service.
4 - Many girls say they will not do anal. But if you show them some cash - example 100-300 RM most girls will bend over and spread those cheeks. But if they still say no don't push it.
5 - Many girls speak a little English, except the Chinese girls. But always ask the agency and they will tell you.
Here are some agencies I used.
http://klstarclub.com/ - Good selection of girls and clearly says what they will do. Had two girls through here. Both Thai - one was ok, one (Ann) was excellent (best bbbj ever, rim job i didn't have to ask for + anal for 50 RM). Easy to communicate by text, reasonably on-time, and may text you after to ask how girl was. Girls who do not get good marks are gone quick.
http://www.as161.com/ - AsiaWorld has a great selection of younger girls (but not always as young as stated) and you cannot beat the price. Had one pretty Vietnamese girl from here all evening/night (8 hours). No rush, good bbbj, daty, tight pussy I fucked as I wanted, and fucked her ass too (extra 100 RM, but let me do 3 times). Got her contact and met her a few more times on other visits. She is still in KL working, but for different boss.
http://escortspa88.com/ - Good selection, were always on-time. Had two girls - one from Myanmar and China. Both young as advertised. Both good experiences. Had the China girl back twice. One feature I like about them is they have chat on their website so no need to call/text.