Given that there's not much creativity a director can inject into solo stroke material, perhaps SMS17 should have focused less on where the jizz is unloaded (cups/mirrors/shoes/etc.) and more on maintaining a consistent level of heat.
At least all the gals stiffen up. Yet aside from trannies who spooge into props, there are others who simply shoot blanks! If they hadn't mentioned that they were cumming, no one would be the wiser. All in all, a bland entry in the series.
Retailing: Habitual fans might be more forgiving.