After watching the Assembly Video on YouTube, all I needed was for the Installation Manual to identify each specific part. I was very sure I could set it up without any problems. With those 2 materials working together, even only 1 person can confidently assemble it in no time at all as I did. One reminder - do not FULLY tighten any of the sections until you have assembled the ENTIRE bed.
The only thing that gave me a second look was the Twin cross bars which were 11/16 inches (cross-section) and not nearly as thick as I thought they would be. Those would not be a problem whatsoever on the Full/Queen that has a middle long component but on the Twin without that middle long component, a middle sag issue could come up after a while. With Vecelos 3-year warranty though, I suspect they are well aware of that and I quickly dismissed it.
Overall it is sturdy, looks great and a very responsive customer service if you have any questions at all. Highly recommended.