Really? Do people really think one person's sales experience will be predictive of theirs?!?!?
So much of how you get treated in the sales process is driven by YOU, that a review by another buyer is virtually useless.... what if the person doesn't know that "$100 under MSRP" is a screwing??? What if the person likes the fact that the salesmen called them Miss, and offered them water or soda?? They may love their salesman- but you might hate him.
I've had great experiences with buddies at car dealers...and have been sitting there listening to another buyer getting drug through the coals on a deal... does my positive count? I can rate a few salesmen highly- but I can guarantee that if they were to sense a newb was coming in with money in their pocket, determined to close a deal today, they would wring those dollars out of them. Even when I was able to get a few hundred over cost.
I may sound preachy, but you must select the salesperson remotely- via the phone or email, or both- by screening them with the expectation that you are "looking for a deal pretty close to invoice, maybe 500 or so over"...if they blow you off, you pass. If they engage, explain you are working with a few other dealers, but would like to work locally- "provided it wont be a waste of my time or yours, I can swing by and we can talk". Again, you are setting expectations, AND letting them know that if they pull the usually you will be gone and buying elsewhere. never say "I want to buy today"...not even, "I am willing to buy today of the price is right"...
Just like salesmanship is managing customers, manipulating feelings, etc, etc, SO IS NEGOTIATING.
here is one technique: create a 'deal' at another out of the area dealership- perhaps 'near my sister who I visit a lot'... tell them it is a great deal, but since you will be getting it serviced here locally, they should get a shot at it. Don't draw a hard line in the sand even....they may come within $200... then say, heck, by the time I drive one car there and two home, and the hassle...'fine, lets do it'.....all these little white lies are designed to create a plausible alternative for you, in the mind of the salesman. IF he wants the sale he will have to accommodate your alternatives to some extent. And of course you will need to be willing to walk.
Just some ideas, sitting by the pool here...