Well here's todays update. Cleaned a few tanks out today, but gave the Kayfun clone and a Russian a damn good clean out - cos I wanted to set them up.
So first impressions, I was a bit dubious about both of them to be honest. The Russians came with all the extra bits (wick, clear tank, tools and all the spare seals) and the Kayfun has more logos than the original - it's more of a Kayfun Lite clone. But the Russians came in a different box from the ones I've seen elsewhere, plus the "Russian 91%" logos look different too. The KFL clone has the cheaper white silicone seals, but when it's all together you can't even see the joints. Both seem to have small coil screws, so their a bit fiddly to set up (like the Rocket). Also there was tons of crap inside the mouthpiece of the Russian, so I used a different tip.
Anyway, after cleaning, built a couple of nano coils and put some cotton in them - 1.8 ohms on the Russian and 1.4 ohms on the Kayfun. Filled up the Russian with Banilla and the Kayfun with Strawberry/choco/caramel.
Tried the Russian first, no air at all - opened the airflow fully - superb, great flavour and vapour.
Next the Kayfun - just as good as my FT Kayfun - again great flavour and vapour.
So despite the fact that I was a bit worried about them, they both work just as good as any other atty I've got
As long as they don't leak or give dry hits, I'll be very happy indeed.