I am going to see a provider in a few days this will be the first time for me. I was wondering if any one could tell me:

A) How many reviews is considered enough to be trusted 2? 10? 30?  (and yes i got a vip acct)
- Depends, a couple can be enough if the two people that reviewed her have many other reviews.  To find out how many reviews that her reviewrs have, click on their username.  Check some of the profiles of other providers that they have seen and see how many reviews those providers have.  By back tracking you should be able to allay your concerns.

B) whats a good tip amount, the donation is $$$.5 for 1hr and $$$$$$ for second.
- Depend upon how good you felt about the session.  Most good providers do not expect money beyond the session fee but probaly would accept tips if they are offered.  If they session did not do anything for you, then you should not tip, same as if you got bad service in a resturant.  But if things went well, you may want to tip based upon what you feel comfortable with, as long as it does not insult the lady.  It is better not to tip all all if you are going to give a lady $10-$20 for a $300/hr session, but if you hand out a $50 the situation more than likely changes.  

C) If i left the donation in the bathroom instead of handing it (and told them in email) is that a good way to deter the LE.. cuz its not a negotiation for anything.
- If LE gets into a room with you, you are done if they want you.  They have seen everything under the sun and can overcome any attempt by you to look like you are not trying to pay for sex.  Your best recourse is to research and work your ass off to insure that it is very unlikely that LE will end up in a room with you.