I definitely do not know much, but I am flattered!
I have some experience with many devices/setups, and I am a bit opinionated, but don't misinterpret that as me being the most knowledgable guy in the room... I am not. Read as much as you can, and try as much as you can, there is no substitute for experience and your mileage may vary.
I like the RiO because it is simple, economical, back to the basics, and IMO far better than any atomizer based setup. It is not as refined nor precise nor as expensive as a decent enail setup, there is also a learning curve, but RiO is the real deal all-in-one unit, my favorite portable ever, and a cold starting beast. It is also simple to clean and comes with a great travel case.
Ive said it in other threads, RiO does not replace my enail and don't think it ever will, but it compliments it beautifully and is a prized travel companion.