Putting together this gazebo is a large project, it took several weekends to put it all together.  95% of the work can be done by two people, but getting the 14' roof panels up and secured needs 3-4 people.  You need patience to put together all the pieces accurately.  You will need a hammer drill to secure it to your concrete.  At the very end putting the roof trim on using the self tapping screws do not work by themselves, you need to pre-drill holes in order for it to secure.  Overall it turned out very nice.