I've got one I use for working outside in winter. Works fine but thirsty on power if used for long periods and replacement lamps expensive. Mate has a propane patio heater and would be my choice for just sitting outside.
The only problem with chimnea's is the sparks we had a do and a few turned up with new expensive fleeces, well in the morning their fleeces did stop much wind .....put it that way
My missus wanted to be warm on the patio, so I set fire to her, but she wouldnt stand still, women huh------ no pleasing them.