Arrived at time promised and it took 4 people to lift the packages off the lorry. We had an experienced carpenter/handyman assemble the toilet for us and in his view it is not a job for the ordinary DIY man. We would have struggled to build it ourselves. Unless you have similar skills I would opt for Dunster to build it for you. Good quality finish and a sturdy building when built. Roofing felt recommended to waterproof the roof.