Im in the UK so the e-liquid side of this makes it perfect for me as my out and about vape, i can fill one chamber with can + liquid and the other with the good stuff, that way all it takes is a quick flip and boom I'm blowing out nice milk and honey scented vapor, and no officer this is an e cig look here's my liquid in bottle and pipe tobacco
I would add the Haze isn't the best device to use for e-liquid (normal e-cigs/box mods give vapor on demand with no heat up and battery lasts longer) but it is a really nice option that it can do it, just another feather in its cap on how versatile the unit is.
As for smell IMO the cans are best (less smell) but there will be some smell no matter how you use it.
There is a video review by vapefiend if you skip to around 5 mins 30 secs it shows e-liquid use:
http://www.vapefiend.co.uk/haze-portable-vaporizer.html
Hope this and my random ramblings help a little