How it actually works
Two single divan bases sit side by side and lock together with linking bars, so they cannot drift apart in use. The mattress pair zips along the join.
The feel of the centre join depends on the mattress design and bedding arrangement. Compare the system in both configurations where possible and use the manufacturer's recommended bedding sizes.
Follow the supplied instructions for joining, separating and moving the beds. Include the changeover process in your housekeeping routine rather than relying on a fixed conversion time.