...We're not talking about 10 extra pounds or 5 extra years, but if she was pretty in her photos and "too ugly" in person, then she deceived you and you have the right to walk away.

Sometimes, it's the same girl with a new hair-do or color.  Unless that's your kink, that would be a cheap "walk." I recommend against.

Sometimes, it's the same girl with a boob job - if recent, she might claim "too sensitive" or "out of bounds until healed." That could be a walk. (Most girls take time off after a boob job to recover.)

Sometimes, it's another girl altogether either claiming to be the other girl or the roommate or friend (but you don't know her from the ad and didn't read her reviews).  That could be a walk.
(At an AMP, you make an appointment to see Mary but they overbook Mary. They try to stick you with Susie. You can walk and say you'll come back when Mary is available.)

Sometimes, it's the same girl but extreme Photoshopping. - Tough call, depending on how extreme it is and how assertive you want to be. Tattoos are almost always PSed out and the ad should say so, so that's a weak walk. Cellulite is almost always PSed out but not stated in the ad.  

Sometimes, it's the same girl but the pictures are way out of date and the age claim is just not credible: older, wrinklier, fatter, ... That's a walk. (Hoo boy ... I had one of those - she was in the same plaid school girl outfit in the pic but I almost wanted to say to her, "I'm sorry, I was expecting to meet your daughter, not you." That was an easy walk.)

No matter what, consider the situation you are in. Are you inside or still at the door? Are you just inside the door or all the way to a back room? Are there others on the premises? Is it a MP setting or an apartment setting? Mamasan doesn't want trouble; boyfriend in the back room IS trouble.

Some guys offer a partial payment for time and trouble if it's just disappointment or what you feel is not a good match. For genuine and deliberate B&S, it is nearly unanimous that such behavior should not be "rewarded" with any kind payment in order to discourage it

I would always want someone to walk away if they got to me and I was not what they were into. It's easier to have compatibility if you are happy and it's better for me to not get a review that I'm not "your type"  

I wouldn't want someone to be unhappy with their "purchase"

xoxo

Hallie B

pics +/- a few years and a few pounds, then it's on you.

Like has been said, if it is a B & S, then of course you can walk. If she is coming to you (outcall) and it isn't the girl you thought you were going to see, then simply say, "May I help you? No, I'm sorry you must have the wrong room." Much easier if it is an incall date.

On the other hand, almost no one looks like their boudoir photos.