For me personally, the ZEO is an addictive device. I actually feel excited when i wake up because i want to see what my ZEO score is which tells you how good your sleep was. Not only that, it tells you exactly how much deep sleep you got vs REM vs Light vs wake state. It actually gives you a graph with exact timings of when you fell asleep, when you went into deep sleep etc. For me its worth it because as you can probably tell, i am fascinated by what can be achieved with proper sleep. This device lets me monitor and adjust my routines because i can see trends of what i do during the day and how my sleep is affected. Like for example i was travelling last week and skiing 6 hours a day for most of the week, the days when i was exhausting my body, the trend was that my deep sleep was more, which makes sense as your muscles are repaired in deep sleep. Again if you work out, its good to know that your getting ample deep sleep otherwise your gym workouts are pointless if your goal is muscle gain. This device gives you the ability to monitor which i believe is key in achieving quite a lot of things. Now on days when i go through vivid or lucid dreams, i know it as soon as i wake up, for example one morning when i woke up, i had the vivid dream fresh in my head which at the time felt like it went on for atleast over an hour, and the ZEO device confirmed it that at exactly this time i started REM phase for this long. On top of that you can upload your data online and it creates trends and provides tips for sleep etc if you are really into this whole sleep phenomena. If this fascinates you, then i would definitely recommend it. Also its a really good alarm clock, waking up to the various alarm tones is refreshing and doesnt hurt your head. The one i have set is of a natural sound of the birds chirping outside, so it almost feels like a natural wakeup, as if there really are birds chirping outside is how clear the speaker on it is.
Also to note, 90 pounds which equates to 141 CDN is a rip off for just a head band. I paid $150 for the whole set including the alarm clock :
Zeo | Purchase