...so I fix an appointment with a well reviewed provider (TER!) in NYC...give her a call, she tells me to go to the general area and then call for the apt number.  One hour later I am in the area at the right time (5 minutes early in fact) and I call and no answer.  I call again, get her voice mail, I tell her I am waiting and will call again in 5-10 minutes...this goes on 3-4 times and then I leave pretty bummed out.  This is the first time this has ever happened to me and  there could not have been enough said between us for her to get any strange vibes.  THe provider is from Brazil so perhaps we got a language problem here? Do providers realize that for most of us hobbyests out there, finding the right day and time to see someone can be pretty limited for us (try less than once every 2-3 months)?  So my wallet was happy but I am pretty put off by this...
Second question...I was thinking a writing a brief review warning others of a potential no show.  SHould I be so hard on her?  Maybe something did come up...any comments?

You can't write a review since you did not actually see her.  why don't you wait a couple days and try emailing her to get her side of the story.

provider, and the word 'no show' all in the subject line.
Then you tell your story. This way, if anyone, while doing their homework in choosing a provider, wanted to see anything that might have been posted about her, they can do a Find Message search and see what else they can find.

I ageee, though, wait a few days first.