We are so pleased with this purchase! The vanity set arrived strapped tightly to a pallet and well packed in styrofoam, thick cardboard cornersbox. This unit is SUPER heavy (320lbs!)! It took (4) adult men to move it to our 2nd floor bathroom. The marble top IS attached to the cabinet. The cabinet does come with a finished back. We needed the plumbing holes to be a tad lower to fit our existing pipes. So instead of cutting the openings bigger, we removed the back panel by unscrewing it to access faucet install more easily and then flipped the back panel upside down which lowered the openings to our desired height without any additional cutting. This vanity is stunning! The four center drawers and under sink cabinets provides ample storage for my hair dryercurling iron, etc.! A must buy!