My first was a SE from the mall, truly sucks, not good for much other than dripping very carefully to not ruin the batteries. One of my SE batteries is gone currently back to Florida to RMA in warrenty. When it get back (If it gets back), my second battery will go back then as it has now quit also.
901 was my second buy, it is good, draws a little to hard IMO & I don't think the carts hold enough, constantly topping them off, but juice flavor is good.
801 next buy, love it, but I do find, (I am guessing since the atty burns hotter), After about 2 days, I have to put new fiber in the cart, even washing it out & looking clean, it taste awful. I have to be careful with it or it is such an easy draw I can get choked pretty easy on it.
401 my gift from the pageant, love it, easy draw, carts last, battery last probably 4-5 hours. The only drawback I can see with it, is the battery will light up & heat atty due to noise, wind or vibration & can get very hot & burn you in a pocket, purse etc. I would not carry this somewhere, you can't keep an eye on it. Tonight I tried something just to see what it would do. I used it in the car & just let my vents blow in my face normally. That is enough breeze to turn the battery on & heat up the atty. I set it on a speaker & turned up the tunes, same thing. I think this will be my choice for home use, but not carrying out.
510 I just got also, It is so close to the 401 except the manual switch. Love the switch, draw is perfect. However the switch is so easy to push I would not want to carry this in a pocket or purse either I don't think.
To end, I think at this point my fav for taking out will be the 801, (the size doesn't bother me as I am used to chewing on an ink pen half the time anyway LOL). Carts & battery life in these are great, SO I change the fiber out new every day or so, no big deal & a bag of the stuff would last a lifetime.
Favorite for home use, will be the 401 or 510, they are much smoother, flavor is much better.
I want a Kissbox, but.... darn the price! Are they worth it really?
Hugs,
Teresa