Count on at least 4 hours to assemble this item.  The instructions were fairly good the could improve them by being more clear on inside vs. outside positioning of the individual piece but over all re good. I bought the largest unit and it has a big presence in the room   My two 24 pounds Cockapoos can fit in it comfortably for night time sleeping but I would not recommend leaving them in it for day light kenneling. My dogs are use to wire crates and so far have not taken to their new digs. I’m going to remove the middle divider to see if that help. I got the grey color and it’s a decent, the wheels are ok but wish they were w bit easier to roll the unit around. Over all it is a decent item.