Pee tapes are aimed at a pretty specific demographic, and thus ordinarily lack widespread appeal, but these installments get around that in a couple of ways. Though it lessens the "voyeuristic" aspect, the performers address the viewer directly (fourth wall, schmourth wall) in an often derisive, mocking tone, and masturbate extensively before loosing the liquid.
A sizable chunk of the pee tape audience is probably submissive males, so this tape targets them directly with the sneering threats of the girls, mostly of the "You want me to pee in your mouth, you sick bastard?" variety. The tape is largely shot looking up at the girls.
Also, the tapes are shot well (mostly outdoors, and at night), the sound is clear, and the lighting is good. Julia delivers her monologue in her native language, which is somehow a very sexy touch, and Fantasy squats over a glass tabletop to do her business, with the camera shooting the action from beneath. The urinations are rerun at the end of each scene, as well.