Great review! Even before you mentioned who you had bad experience with (out of the list of 4) I already knew who it was. I seen the 4 you seen and I have the exact same ratings with Chacha being on top. Glad you had a great trip my friend!
If you can afford it, it's worth it. For some people the $200 uncharged for a younger, prettier and lower volume girl is worth it. With that being said, it's no gaurantee. Supply and demand. The girls can charge whatever they want.