The bed arrived ahead of time. It was like a meccano set, but was straight forward to put together without any help. It is light but surprisingly solid.
The advice I would offer is 
1: Put the crossbar for the headboard on to the feet before you put the feet on to the headboard.
2: To fit the bolts into the nuts to create the side frame I put the Allen key through the centre of the nut and out the other side of the frame and used it as a guide to get the bolt in place. 
3. Use the central crosspieces to decide where to put the double slats that attach the central support legs. It is not clear from the instructions, but is easy to work out.