I started off with smileo's and then switched to tanks, myself I prefer tanks over the smileo's, I find the cleaner/truer flavor with tanks. But think they both have there pro's and cons.
Smileo's are easier to use and and more durable, can fill and throw in a bag or pocket and not be concerned of coming apart or leaking, you can turn the voltage on the DAV all the way up and work fine, and I do like the rubber tip on them, I can hands free vape with them, which is useful for when at work. But you can not see how much juice are in them, so need to make sure you keep them topped off, I have burned one for not doing this. I have successfully cleaned the smileo's with washing out with hot water, then a 24 hour soak in vodka, then wash again and let dry for a few days.
The tanks have to be treated lot more with care, I have pulled the tank with juice in it apart twice by accident, the last time I was cleaning my battery and was hold the tank and pulled the tank apart, lucky wasn't much juice in it. They do take a bit more practice to filling than a smileo, but once done it a few times, then it's pretty easy, just have to make sure you do dry hits when using a new carto. Of course you can see the juice, so easier to see when need to fill it up. I have also cleaned the carto's with tanks, only re-used 2, 1 was good, 2nd one started leaking straight away, but think tanks in the long run are cheaper, as only need to replace the carto when it's bad.
Due to cleaner juice taste, being able to see juice levels and different colors, I do prefer the tanks, but really is personal preference, as K9 said, just get 1 and see what you think, some people love the smileo's, some love the tanks.
