Well, Im currently favoring my new Grip, the drip one not the bottom feed..havent tried that yet. My Helix is a favorite with the 26650 battery, trying to find some 26500 batteries..My baby is the SB...have bought 3 of them, gave one to my son..he loves it..LOL. The one thing I have really discovered is that if Im doing 3.7V just about any of them are as good as another, with the right atty or cart..Im now using the dual coil cart from hoosiers supply, I really like it, but it does not have a long life and does not clean up good at all..lasts about 3 days..(same juice) and is great for 3 to 4 hrs before adding juice, also like the Vortex, but dont like using the adapter.