My husband and I assembled this pergola together one Saturday and it took us about 8 hours total.  He has plenty of power tools but not a very strong wife :-) but we did it!  The kit was complete and instructions fairly easy to follow.  The result is strong, and beautiful!  The wood is prestained, and it appears we might need to brush on a coat of stain every year or so.  I've bought little solar powered light strings to run along the top, and it's a most enjoyable place to sit and relax.