Okay, so I've been using this PTC ceramic space heater for about a month now, and I have THOUGHTS.
First off - the 2-second heating? LEGIT. It warms up crazy fast, like 'forgot my jacket in the car' fast. The oscillation is great too - covers my whole bedroom without me having to do the heater shuffle.
The humidifier feature is... meh? Like, it's there. It works okay if you're sitting right next to it, but don't expect tropical rainforest vibes. The separate water tank is nice though - no weird steam mixing with the heat.
Now the body sensor thing? Cool in theory, annoying in practice. If I'm binge-watching shows and don't move for 20 minutes, this thing thinks I've left the building and shuts off. Not ideal for lazy Sundays.
It IS super portable though - lightweight enough that I can carry it from bedroom to bathroom without feeling like I'm at the gym. And quiet! Like 'can still hear my ASMR videos' quiet.
Would I buy it again? Maybe? It's good for small spaces but don't expect it to heat your entire apartment like some reviews claim. Also pro tip: keep your receipt just in case.