Okay, I have a nautilus mini
tank with an istick 30. It was my first (and only) update after an ego.
Here's what I can tell you:
The nautilus mini will work on an ego (I needed a 510 adapter though, they're like $2)
The taste and vapor production is not as good as you'll get on a Variable Voltage/Wattage battery, but it's probably still an upgrade over the stuff you're using if it's giving you issues. (I do still have an ego, and will occasionally use my nautilus on it when I get caught letting my istick die, oops)
If you are interested in upgrading your battery, you can't go wrong with the istick 30.
It's pretty small, fits well in your hand. As far as wattage is concerned, you just start low, and slowly move up through the wattage until you see what you like.
The nice thing about the nautilus mini and istick 30 combo is that you have a pretty wide range of options.
When I started out I was hard core tootle puffing. I kept my istick at the lowest wattage, and kept the airflow holes on the mini at the smallest. in this way it was VERY much like using an ego. As time went on, I ended up moving up the wattage and the airflow a bit. I'm now usually pretty steady around 12-13 watts and the biggest airflow. I get more vapor, but still the throat hit, and not as tight of a draw. It's very customizable to what you want.
The
coils are about $2-3 to replace, but when you're in the lower wattages they usually last about 2 weeks if you aren't using super dark
juice. at 12-15 watts I seem to still manage 2 weeks from them on clear juices.
I can't recommend the 40W temp control because I have no interest in TC and I haven't tried it. I'm still debating the 50w, (only for the longer battery life) but given it's issues when it first came out, I'm not sure I'm ready to take that jump.
The 30W istick and Nautilus is a time proven easy upgrade from the ego. It's simple to figure out, pretty cheap to buy and coils aren't too outrageous. My battery life is about a day and a half as of right now. But when I was down at the lowest wattage it was closer to two days.