Slap Hally 13 is more of a slapping feature than a spanking feature, but, as yet, there's not really a fetish to define people being slapped, so it's more a spanking feature. In addition, there's a lot of spanking of asses and tits to boot, so the genre kind of fits.
What we've got here is a niche market film. Some people might find it hot as hell to watch sluts get slapped in the face while sucking cock, while some might find it offensive. Whatever.
Bonnie Jo is a hot blonde who looks killer with a dick down her throat, and getting her generous ass spanked. Chelsea Zinn, too, takes it up a notch by gagging on some dick.
Again, this isn't going to be for everyone, but those who like slapping will most likely really enjoy it.
Retailing: Slap fans probably don't have much to choose from.