I've tried a couple advertised as 1.8 ohm. On my 3.7v regulated eGo, they tasted burnt more often than not. So I put them on my Spinner and started at 3.3v, and they worked a lot better. I have some advertised as 2.2 ohm coming, and I hope those work better at 3.7v.
They take some work to get started, though. Don't just fill and go; you have to let them sit for a while - maybe even overnight. Every few puffs, do some dry pulls without firing and some bubbles will come from the wick holes. I assume this helps in getting juice back into the coil.
Overall, I think they're in a tie with the Kanger T4's. The Nanos have a better drip tip that screws on. The T4 is a little warmer vape.
Do not pocket-carry them without a cone or other protection. They are very fragile.
