I've been with Nikki - I'd give her a mixed review.
If you like the Barbie type, she's stunning to look at. Long blonde hair, pretty and tremendous body with big fake boobs.
She didn't mind me playing with her tits, but is very sensitive downstairs with oral. Claimed it hurt her a few times when I wasn't being overly aggressive.
Her communications were very good and she played out the scenario I'd asked for perfectly.
Fucking her doggy style is a great view and her oral isn't as bad as some others have suggested (although it's not outstanding).
She did bleed on me though, but claimed it wasn't the time of the month (first time that's happened to me with a while).
Looks: 9/10 (but I'd a Barbie type fake look that isn't for all)
Personality: 8/10 (nice enough girl)
Services 6/10
Would I see her again? Yes I probably would as she is stunning, but the fact she is so sensitive with receiving oral and flinches a bit just lets her down a little.