I had two main issues with the squonking REO (which was a beautifully designed and built
mod, not taking anything away from it.)
The first was I hadn't considered changing juices and needing to either clean the little bottle, or meld sometimes diverse flavors.
The second was (and I haven't looked at any others, so perhaps this isn't how all squonkers function) that pushing the
ejuice up eventually left a little puddle atop the mod. Didn't leak, per se, but it was there to be reckoned with. So, for me, not a
device to slip into my jacket pocket.