FYI the first year NXT series had some issues because the dipshits in China switched up materials without telling the designers. This caused the ladders and the pods to break. Last season it was completely fixed.
Flows don't change the speed of strapping in at all. I've ridden regular straps and flows you're talking seconds nothing more there. In deep pow they fucking suck to get into thats pretty much a given. The response is completely different than a traditional binding.