This unit arrived in a huge box that was too big to bring inside by myself, but when I opened it, everything was in 3 separate boxes, so I just brought those in the house to assemble it, which took an hour or so and just needed a screwdriver and the hex key provided. I love all the different settings on the fireplace unit, the sliding doors (and safety shut-off feature) and the general look and size, which fits my modern rustic/transitional style. The only downside was that it took a long time to get here, particularly since it turned out the shipping warehouse was all of 45 minutes from where I live (it took 13 days to get here). I wasn't in a rush, so it wasn't really an issue.