The results you can achieve are really beautiful - truly salon-quality - with less heat damage and more volume that using a curling iron or straightener. A great option for my fine hair that lacks volume.
One of the key benefits of the Cloud Nine system is that it's modular - you can start with this pod and then buy whatever sized rollers suit you. It's a lot better than buying a set where you don't use half the sizes and run out of the ones you like! The marketing material sings the other benefits pretty well - 4 sec heating time (which is actually accurate), indicators on the rollers, cool touch straight out of the pod, etc. It's pretty nifty. Beyond that, I find this to be the perfect system for silky hair, which can be hard to roll onto the smooth surface of hot ceramic rollers of other brands. Velcro is so much easier and faster as my hair doesn't slip off.
The Cloud Nine System obviously isn't the cheapest - but you can justify the price because it's genuinely innovative and has a genuinely short heating time. The big cost is really in the pod - the additional rollers and clips are pretty reasonably priced.
If you can justify the price, you won't be disappointed in the results - truly gorgeous.