I still have issues with using just a single juice for that long so I mostly use cartotanks and one of my ProVaris....lol
One of these days I'll figure out which juice to load that bottle with, though.
That'd what makes the mini perfect for me - 3 mls - which is close to what a lot of carto's hold. And - I have spare bottles, so I can easily re-wick and change the bottle out in under a minute! And the bottles are smaller than my carto tanks.
I do plan to get a Provari as well, because there are times I enjoy using a tube mod. I surprised myself though - the flavor is what I was chasing, and flavor is what my REO's deliver, every day.
To the OP's question about is it ugly - not in person. When I told the guys at my local B&M that I was getting a REO, I got high fived. Any time I go into the shop (for hanging out with other vapers for the most part), I get swarmed by people asking to see them, pop their tips on them to try them, and every single one goes "wow!!!!" on their first try of a REO. They're blown away by the clean pure taste the REO delivers.
Was at a reptile show this past weekend, and was sitting on a bench vaping, and noticed a group of vapers across the way, and saw them covertly looking my way. One brave soul came over and asked me about my REO's, got super excited and waved all his friends over. They left me still talking about the REO and Rob's website written down to check out when they got home.