"Power pumping is clinically proven to increase supply." Not exactly. There are no high-quality randomized controlled trials specifically on power pumping. The concept is based on the well-established principle that increased milk removal drives increased production (supported by extensive research from Kent et al. and others). The cluster-feeding-by-pump approach is mechanistically sound, but the specific protocol hasn't been rigorously studied in a clinical trial.
"You'll see results after one session." Unlikely. Milk supply adjustments are hormonally driven and take 2-5 days to manifest. Any increase you see during a power pump session is from more thorough emptying, not new production. Real production increases show up 3-7 days into consistent daily power pumping.
"Power pumping is the best way to increase supply." It's a tool, not the best tool. Fixing latch, increasing overall nursing/pumping frequency, addressing medical causes, and proper flange sizing are all higher-priority interventions. Power pumping is best used as an adjunct to these fundamentals, not a replacement.