Being new to vaping, I have nothing to compare it to tho I did do extensive research looking for "best of" and why. I love your why. I will say I love the shape and size, it fits very nicely in my bra, there I said it. They are nice to look at too and love they come in a variety of colors. Is it true for all vape devices that you have to change the cartridge every 5 refills? That's disappointing, that's not much... tho I get it. I've purchased 3 whole units and noticed that only the first one had a firm seal between the cartridge and the device... meaning the other 2 have a "hiss" and if I want a solid draw I have to wrap my fingers around them both to seal it.