Well that depends on each Client's Expectations. Everyone's Expectations are different. But as an Overall View, I'd say they're pretty much the same as a Civvie Girl.

Practice makes perfect;) thats the difference

between pros and civvies. That and the girls you take home from a club are probably sloppy ass drunk and might puke on you and you probably have to take them out for breakfast in the morning and are liable to have become her boyfriend overnight...

XXX-Giselle Parker

Professional or not I think  a "fantastic experience" with a woman requires the following:
1. She is comfortable with her body
2. She stays in the moment, right there with you
3. Here is where it gets tricky, chemistry, either two people have it or they don't and sometimes they have it then it goes away, lastly if you don't have chemistry at first it is possible to attain if points 1 or 2 are evident.
Again professional or not,
and I would imagine the same could be said by women about men...hobbyist or not.

'Professionals' ensure competence and knowledge in whatever area that they are skilled in. It just so happens to be that our profession is in the line of pleasing many which requires quite a bit of practice, attention to what works/doesn't and appreciation of the overall experience.

whether there's an envelope of money left after the fact or not.

I was more of a slut as a civie than an escort. Now, I'm selective and exclusive. Go figure! lol

You can't guarantee chemistry and that's *really* what it comes down to.

The next question then is how can you test for chemistry before a date is made?  I don't think either party wants to spend time or resources for a situation where chemistry doesn't exist, so how can you establish that before meeting

I would have to say...

As far as speaking for MYSELF. One of the main reasons that I am a provider is because I feel that I have talents in this area.  

I am comfortable with my body. If I could walk around naked all the time - I TOTALL would.  

And almost everyone I have been with Civvie wise says I give the best head EVER! I have had competetions before - and I always win!  

I am also told I am TIGHT. All the time.

I am also a TRUE Bisexual and LOVE to give to a woman.  

So I am all around talented. As far as others- I cannot be sure. But for myself - I would bet that compared to ANYONE civvie or not I would win in a contest. And if you don't believe me - PLEASE try me!