Easy to assemble after watching youtube video. Seems sturdy. I have it set up facing towards a corner of my deck used as an eating/visiting area (approx 8' x 8'). So far, it feels cozy and comfortably warm (outside temp around 14C). Will have to see how it feels when the weather gets colder.  A good tip is to make sure the heater is facing towards objects (eg. chairs, table, house siding) and not just open space, since it works via infrared radiation.