Just thought I would give an update on the EGO ONE. I am on the end of day 6 and yep still love this thing lol. I have gotten annoyed at not being able to tell when I am low on juice in this tank but as far as performance goes the tank works amazingly. I have had no dry hits, no leaking actually no problems at all other than I can't tell when I'm out of juice. I did order a Nautilus Mini Tank to try with this battery and got it today and well it works great on the battery and fits perfectly. I can't tell much difference between the two on vapor or flavor but the EGO ONE tank does seem to have a bigger throat hit. I am still playing with nic levels and find that somewhere between 15-18 is working the best for me. So I have the EGO ONE tank set up with my menthol mix and using the Nautilus Mini for my plain juice. It's really awesome to have two great tanks to switch beteen and good battery life to go with them. Here is a picture of the batteries with the EGO tank and Nautilus Mini tank.