It's just a personal preference. I have a Vivi Nova, Smoktek DCT, and Kanger Pro tank. I use Johnson Creek Wisconsin Frost 100% VG juice, it has a mild menthol flavor (I was a menthol smoker). With the Vivi the taste is pretty much exactly like the smell of the juice, which is a little too much menthol so I use steeped or older juice in my Vivi. The DCT is kind of medium, I usually mix new with steeped. The Pro tank/eVod I put the juice in brand new and love the flavor of that the best, but all three are good products. I have found it is quite easy to burn the wick on Vivi's so make sure u have plenty of heads if ur a newbie. The DCT's atomizer is inside a good amount of wick/cotton, I haven't had any problems with it or the pro tank/eVod as far as burning the wick. If u want the purest, and I mean absolutely pure, taste of ur juice the Vivi is great.