Bed was well packaged and easy to build, my 4 year old and I managed fine with a couple of simple tools (although there were no tools supplied like some other flat packs we've had) 
The bed is fine but the low rating is because I paid £25 for delivery of a "Free Delivery!" item as I live in what is classed as a "UK Extended Area", but the delivery company, XDP Express, did not deliver within the specified dates Wed - Fri, they delivered the following Tuesday and failed to contact me even though their tracking site noted they had emailed me! 
I would probably recommend Wayfair, but be wary if you are dealing with XDP Express!