I loathe pseudo-science BS (I work in public health and used to be a vaccine safety researcher, so that's where I am coming from), but I have used sensory deprivation tanks before and they've helped me relax and made thinking more clear for me. Though it's generally for an hour at a time, not 4 days.I dunno...I feel like this would be very beneficial mentally. I mean, sensory deprivation tanks are a thing, and I know that many people swear by certain meditation techniques like the ones where you can't talk during the entire duration of like a week. I, personally, would love to try it, and have wanted to try a sensory deprivation tank for a while now, but the local spa that had some burned down recently. I mean, Rodgers might be a nut, but I don't think this particular thing is so crazy.