Warning: This will probably be a long read.
To be honest, I was a bit hesitant at first. I read and read and read about different mods. I was either going to go with a Provari or a Reo. I came over to the Reo forum and it just felt like home. Kept reading about them and figured I could play with the vapor, sub ohm (with the new kits, right now only to around .7) Drip if I want, put a carto-tank on if I want, pretty much do anything I want. And if I drop it in the marsh duck hunting, I won't have to worry about it not working ever again.
So far I've only built two coils, both at 1.2 ohms and switched the cotton out a few times. I put a different DIY juice in it every night. If I was to do that with my old silver bullet it would be 1.75$ for a different carto every day. Now it's just about 0.01$ (If that, I don't even count it as spending money.) At 1.2 ohms, it puts out a cloud in 2 seconds that would take my silver bullet 8 seconds to put out. I get better flavor, vapor, and an overall better experience with this mod than anything I've ever tried. A client who vapes and has a provari came into my office today and I showed him my Reo. He tried it out, asked for the website and I'm about 95% sure he will be a new Reonaut.