Came well packaged.  Was easy to assemble.  Took about an hour. One small problem: one of the 6mm nuts was actually a 1/4 x 20.  A quick trip to the hardware store and the problem was remedied.  The unit started immediately.  Two major features on this unit.  It has the electronic (i.e.battery operated starter) and the bottom has built in ballast to prevent tipping over (i.e. you don't need to add sand and windshield washer fluid).  I am very happy with this heater.