Hi!
If I was asking for 300$ for one hour I wouldn't expect a tip. I think that is plenty of money for a complete hour. Just my opinion. Have a good one and I hope this helps.
Donna

It actually depends on both you and her.

Some ladies don't require a tip (flat fee/all inclusive).  And some ladies say "tips are appreciated", but most of them will not turn down a tip, if it's offered.

IMHO, excellent service is an 8 or better (what I feel, not what's on the review).  Now, when it cums to tipping here, I don't think the "standard 15%" would work here, but you could ad anywhere from $20.00 to $100.00.  

She might even take you up on an offer of dinner, but don't get upset if she says no, or if there's extra cost involved, even if you do buy.  This is a business, afterall.

The best tip you can give a girl is to become a return client. Showing patronage says you enjoyed her so much you had to come back!

Also, writing a favorable and tasteful review on the boards is good.