This was delivered a few weeks ago and so far I am really pleased with my purchase!  I did not purchase a cover and it’s been out in a few rain storms (apart from the cushions) and has held up fine.  It is very comfortable and so flexible to pull apart/keep together seating.  The cushions are not locked in place but that made it handy to easily remove them.  Once I get a cover, I will use some double sided Velcro to keep the cushions in place.  Overall, a great purchase!