I love my iStick* and mini Nautilus. (Also, Nemesis and Orchid)
In all honesty, *I'm not 100% confident it will last long, so already have 1 back-up.
MVP 20w doesn't interest me, but the new MVP v.3 (30 Watt) is in the pipeline, not for the 30 watts, but the lower ohms on dual coils.