**Be ready for negativity**
For the record, my exposure to The Walking Dead series doesn't go past episode one. With that in mind, I have to say I'm very very disappointed with TWD street experiences. And, really, the concept of street experiences as a whole.
I didn't feel like the monsters were everywhere and there was no escape. It wasn't one giant conglomerate of zombies. In fact, I feel safer walking from one house to another with these "street experiences" than I do when I inevitably cross a Scarezone from previous years. Why? Because the atmosphere wasn't as immersive as a scarezone.
The zombies were forgettable. None of them really stood out to me or contained that "woah" factor, unlike the evil cowardly lion for example. They were just that, zombies. Perhaps the zombie virus could've mutated them, spawning zombies with horrible yellow pus growing from their eyes, extra limbs, razor fingertips... oh wait, silly me, that's not The Walking Dead, so their creativity is constrained by the general zombie model the show uses. Maybe it's attractive to the TWD fan, but to the HHN fan who doesn't follow the show it's easily forgettable.
I feel that's the biggest weakness in the street experience. It targets an audience that already cares about the concept, but it doesn't cater to the audience that cares about the quality of the monster itself rather than where the monster is from.
As for Street Experiences vs Scarezones, I'm just gonna say that letting the horror be anywhere dilutes the horror everywhere.