I LOVE my greenhouse!  Assembled it myself and the putting the top on was the hardest part.  It was something like wrestling an octopus while balancing on a ladder, but with another set of hands, it would've been much easier.  Either pay for the assembly, or be sure to have another person to help put it together.  Once it's assembled it's sturdy and looks beautiful!  It's already been through two severe storms without a bit of damage.  Highly recommend!