I have not used the mini yet, altho I do have one, along with the big one. There is some flicker, it maybe oxygen per say, altho a candle in the open flickers also! so to me, O@ is not the issue, just normal air mix that fluctuates.
You can add some of the fragrant oils, works ok, but frankly, we prefer the non fragrant style WP sells as do some other brands. The wick does last a while. I have yet to replace one in about 3-4 yrs use, not that I use it a lot either! I keep it center in the saloon area, with a small air vent on the cabin top.
She drives me boat,
I drives me dinghy!