G'day wedgtail! Hey Unior! Glad you're both here!
Wedgtail, what's your setup? Sporting iSticks and iPV Minis here.
Unior, what level of nic are you using? I'm wondering if it's a touch too high for you to start (hence the harshness?) Sounds like once you "get used to it", it's not so bad? Other thing with the Nautiluses - DO make sure your coil is very well saturated before firing. I have burned more than my fair share of BVC heads

Now that I've "figured" that out, I'm thrilled with my Nautis.