The Nautilus is a decent device. Now, I say decent because I prefer RTA's but as far as clearomizers go the Nautilus is the best one I've tried so far. And I've tried quite a few (Evods, T3's, mini protank 2, protank, protank 2, protank 3, unitank, aspire bdc et-s, aspire bdc, anyvape davide with both the protank heads and with the extensions with aspire bdc heads, iclear 30, iclear 30s, iclear 30b, and more I can't think of right now). The Nautilus outperformed all of them. But, the heads aren't cheap. If you're tired of spending money on heads and wasted/spilt juice then why don't you give an RTA a try? I know the initial investment is higher than any clearomizer but you also have to think about the heads you're constantly having to replace. I'd say try out a Russian 91% or something similar. You'll get better flavor, vapor and throat hit. You can rebuild coils for pennies and wick is well, it's freakin organic cotton balls, I mean, cmon, you can't get much cheaper. One bag will last you probably the rest of your life and you can get a bag for under 5 bucks.