went on the Haunted French Quarter walk during my stay in New Orleans. The experience was mediocre at best.
First of all, our guide spoke at a low mumble and was hard to understand. When a car would pass, or another ghost walk would be within hearing range, his voice would be drowned out by the engine or by a tour guide who knew how to speak and articulate properly.
With English being my second language, one might aegue that the problem was at my end. But in six weeks of traveling the US, I've had no trouble understanding guides, servers, hotel clerks or random people on the streets. And I was able to understand the tour guides from the other companies who would be telling stories thirty feet away.
The situation did not improve after I asked him to speak up. After asking him to speak up three times to no avail, I just gave up and tried to make the best if it.
Second of all, the guide did spend a lot of tlme badmouthing other companies / tour guides. We passed several groups where he would mumble snarky remarks about their historical accuracy, the size of their groups ("I could actually report them for taking more than 24 people.") or the fact that they were talking about vampires - which he made sure we knew he found ridiculous. Several times.
Badmouthing your competition is straight up unprofessional, and is a red flag in any business.
Third of all, our guide was boasting and bragging about the authenticity of their own tours, and how HTNO Inc was staffed by professors and teachers, rather than "kids in costumes". However, some of the "facts" he told us (e.g. the condition of the slaves found in the LaLaurie Mansion) were exaggerated and wrong. So much for historical inaccuracy.
I'd advise against going on the Haunted French Quarter Walk. My experience was with one guide only, but I'm certain I would have had more chills and have learned more about the haunts and history of New Orleans if I had gone with a "kid in a costume".