I recently visited Exotic Mamacita (Nikatty) in December last year. She was located in a decent flat in the Marylebone area. She charges £100/ half hour, and I stayed a bit longer.
Nikatty is tall, around 5'11", and young - she says she's 22 and I believe her. She has a pretty face, but her figure is a bit straight up and down and boyish. She has no boobs to speak of. She's not petite, but she is slim.
Nikatty gave me a great OWO, during which she got hard without touching (very hot!). She has an average sized dick with a curve. I only topped her, which was fun in different positions. I'm sure she can top, and she certainly got stiff enough. I don't remember her cumming.
Nikatty is laid back but a bit quiet. I think her English was ok, but I can't really remember. I enjoyed meeting her, but I wouldn't rush back.