I've had mine for two days now and I prefer it greatly to the Atlantis. I used two Atlantises exclusively (they replaced my Nautili) since Thanksgiving and they do serve a very functional and worthy purpose, IMO. But as for the Subtank, again, IMO, the flavor (at least on the .5 coil) is far, far superior to that of the Aspire .5 coil. I think it emits a much denser vapor, which is very satisfying. Likely I will end up giving one of my Atlantises to a friend who used it and liked it. I haven't rebuilt the RBA part of the Subtank yet but if the rebuildable performance is anything like the OCC coil unit then the Subtank will replace both my Lemo (great vapor/flavor but the machining was not that great, IMO) and my Kayfun (not enough vapor production for me).