When we opened the box, we felt a bit daunted as there are so many parts.  This is mainly because there are edging strips for the floor, roof, doors and side panels.  That said we found the instructions were clear and easy enough to follow, plus all the parts are labelled, so easily identified.  I built this for my parents who are 70 and 76 and with help from them to hold panels etc I managed to build the shed in 4.5 hours.  I could see someone with experience of building this before taking 3 hours with a helper!  So all in all a good experience.  We built the shed out of the gap it was going in and managed to easily lift it into place once all screws etc were in place.