Before owning, I had completed a lot of research on the Cloudious9, which led to my purchase. In my experience, it is SUPER efficient at maximizing the use of the product used for vaping. I can use LESS product and get more out of my ground material. At first it doesn't quite feel like it's working when you first try the Cloudious9, but after a few seconds, toy realize it is most definitely working, just not like you'd expect like from a pipe or a water pipe; unique in its own way and very nice. I haven't been able to produce big vape clouds, but maybe that's just the way this particular product does it. As long as my ground material is being used efficiently, I don't care about the cloud. Another HUGE PRO is that I can vape indoors with no concern about smell! This has allowed me to enjoy my vape around my family instead of having to go outside to smoke! This has been a great product so far!