I got this just before I headed out to Las Vegas for a lighting conference. I have sleep apnea and ADHD and I would venture to say I haven't slept 5 hours in decades, and I'm lucky if I get that...until now. I noticed in LV the first night I used this (I found one fan setting that's the most bass sounding of the lot) I slept over 7 hours...Huh?!?!? Yeah, and so I wrote it off to jet lag...until I slept 8 hours the next night.I don't know for sure if it's the particular frequency of the fan selection I'm using that somehow enacts some kind of meditational side effect on my brain, but for me it has worked unlike anything I've used to date. To be more specific, I've used a large industrial fan that my wife hates ("that's SOOO UGLY!!!"), which is loud and strong enough to blow my alarm clock off the nightstand if I point it that way. Understand that for me, loud is good. Obviously, it's not realistic to lug that fan around, and it's actually a pain to lug even a small desk fan around, which really never worked that well ta'boot.So I bought the LectroFan hoping it would give me enough sound to drown out noisy hotel neighbors or the equally sleep-depriving state of pure "quiet"...I NEVER expected the unit to outperform my "mega" industrial fan. But it did, and now two months later I can absolutely say that for me this is far and away been the best solution for sleep, and next to my CPAP, I don't ever want to be without this in the future. I have no way of knowing if others have had as good an experience as I have, but mine has been superlative, and for the first time in probably 25 years I'm routinely getting 6.5 to 8 hours of sleep every night.