So I know how annoying it can be from other forums where folks who have had problems don't post updates... maybe I should start a new thread. Not sure.
Anyway. Just wanted to say thanks to the people who got back to me on this thread. I bought and have used the Kroma R for a little while now. Zero leaks which is exactly what I was after. I've used some horrible liquids in it ... but flavour is generally good to me with the O.8ohm coils.
Zlide tank is faaaaaar better than a Nautilus 2. Easier, cleaner filling. No leaks so far... and much easier coil change.
I made the mistake of hanging on to a coil too long before changing... all I'd say is don't be tight and change it when it's not doing what it did at the start. Pretty much like any device.
All in all I recommend the Kroma R for someone that wants a simple mod that isn't expensive and doesn't ( so far ) leak.