I had a nautilus and loved it. Didn't really mind the looks so much. I also rebuilt the coils, so that wasn't an issue either. I then bought a Tobeco KFL+ and will never look back. The falvor from the Nautilus does not compare to the KFL+, not even in the slightest IMO. I was using the Nautilus as a backup but was cleaning it the other day and dropped it on the floor. No more Nautilus.
I don't know if I'm going to replace the tank or not. Don't really need a backup with the KFL+.
