Took my wife and I just under an hour to assemble. I would think if you’re doing this solo it would take double that amount of time. Not overly difficult to assemble. Again with two people. My advice is to separate all the parts by A,B,C,D. Leave the screws and parts in the plastic pouch don’t separate those out. Also leave all of the small parts inside of the small cardboard box. You will know what I am talking about after unpacking. There is very little written instruction it’s mostly picture based.  It’s straightforward enough to avoid swearing and most frustration. 

I cannot say quality wise how long it will hold up. I have some serious concerns about the cheap looking Velcro that goes under the cushions “supports”.  It’s essentially pine looking small planks stapled together with Velcro. Planks is being generous. I envision those breaking at some point. I would think that OSB could be subbed out when those break which isn’t a huge deal breaker. satisfied.