I would definitely want to know.....

and try to throw in some incentive to make it up to you like maybe a little $$ off or a nice bottle of wine etc...
Hugs and kisses
TL

If she has already let her service level go downhill, there may be some other "issue" that is going to hold her back from performing like she did the first time.  Sometimes its easy to "fake" a great first session but if she really didnt enjoy some aspect of you (maybe you're too big for her or she didnt feel any chemistry, etc), she may not be able to repeat the first "performance".

She may be too busy, too sore, have personal issues, or just not value your business.  Whatever the reason, these are HER problems and too many other great ladies for you to spend your hard earned money on.

If shes a "high level" provider, she is already well aware of what is expected of her.  She doesn't need someone to tell her that she needs to do better.

So.... Dont call her back.  

If she contacts YOU asking when you'll see her again, then I think you can tell her why you hadn't called her.  See if she offers something special to make it up to you.  If she's indifferent.... You know what to do!

Most providers know if there game is a little off or the second session was not like the first session. You may or may not ever have a session as grand as the first one again. A little case of YMMV with each visit.

Good luck

Have fun & play safe!

Summer

3rd session the girl obviously puts no effort into it and shows up pussy smelling not so good and then starts asking me for gifts.  I really felt taken advantage of and like you felt that she was taking me for granted. Buh Bye. You can't expect an award winning performance every time, but it's different than feeling taken advantage of. If you feel she was taking advantage of you then move on.

she doesn't want to know and Honest Provider is spot on.

Letting a provider know of a problem is a tricky business.

For every lady who steps up and honestly answers "Yes, I'd want to know" there is another who does not. That issue is very personal and you cannot draw any conclusion about the specific provider you are refering to by the body of answers you get here.

Frankly, with the existence of Blacklists, I would never risk pissing of a provider that I didn't know well by complaing about a "drastic change" change as you put it. I think MOST providers I have seen are fine about a minor complaint if you are kind in the way you present it. But you are talking about something so extreme, how would you even go about approaching it?

I have interacted with providers who are reviewed on TER and even post now and then for whom you'd better not piss off if you know what's good for you. Just like civie women.

I'm just being completely honest with you here. As a man who truly likes providers, I think most providers are receptive to graciously communicated minor concerns. But, unless you really know this provider or have a way to know more about her personally, I'd follow Honest Provider's advice and move on if I were you.

Good luck with whatever you choose.


HalfHour

Like most others are saying - just move on. No words necessary. The exact same thing happened to me once with a well-reviewed lady in Los Angeles. First session was awesome. Second session was horrible. She didn't even shower before my arrival. Ugh. I didn't complain, but I will never go back again. She lost my business for good. I think that's the best way to handle it. Vote with you feet. There are too many other great ladies who provide a wonderful experience each and every time.

after the second visit. I would move on and write a review.

Maybe she had other things going on and should have re-scheduled. If a gentleman experienced that with me, I would want him to tell me and then offer him a great discount to make up for it.

respond they would like to know don't have that situation happen. They are the ladies that take care of business in a professional way and the very high, very low sessions don't happen. As another poster said for every lady that says here they want to know there is at least one that doesn't care and doesn't want to hear it. Unless it was a lady I'd seen many times and never had a less than stellar session with I'd simply move on. It's supposed to be fun. My two cents.

As others have correctly said, she might Black list you or otherwise try to exact revenge no mattrer how nicely you try to put it.  She'll not make it up to you & you should not have to (attempt) to bribe her with extras.   She is a woman & can sense, just as you can, when a session just isn't their best...  if she cares.  
Agreed:  Vote with your feet as you take your business elsewhere.  Realistically, one can not expect ever session to be out of this world...  but a rushed, uninspired session is just not to be tollerated.  Time to move on.  
skb

move on, if she doesn't want your business then someone else will; and be enthusiastic about it.

Most of the ladies I have seen over the past eight years were better the second time.  Those that weren't, didn't get a third time visit.  Number that failed in that department...less than 5%.

...you don't need to tell her you're unhappy and/or won't repeat because she knows she didn't keep up with what she did with you or rather how she did with you on the 1st date.  I'm not "into" how it used to be sessions...if i'm not feeling 100% i'm not making/taking the session.

Never, absolutely NEVER "pre-tip" for an appointment.  A tip, if it is given at all, is given for excellent service.  How on earth are you supposed to know, in advance, that the lady will go above and beyond and earn that tip?  It's very easy to place additional cash next to the envelope or hand it to the lady with a big smile and a thank you!

As far as the lady in question, move on.  She knows exactly what she did.  She doesn't care enough about your repeat business to make her worth your time or money.

.......and they don't reply.

Ironically, the two "worst" experiences I've had were with the highest-end ladies I've seen.  Both were very uninspired...and uninspiring.  I wrote the one, asking if I'd done anything wrong...or not done something I should have, but no response.  The other one, she's requested a good review, so I wrote her telling her it was up, but that it wasn't as good as I'd hoped, for the following reasons: x, y, z.  Again, no response.

I personally....

Am the same Giggly Flirty Young Lady all the time! And my repeat clients get EXTRA taken care of So I think there are no excuses. You should move on to a provider who is really into what she does.