I am using this as a freestanding unit. Well packed. Set up was easy  it cooled down quickly  is fairly quiet. As with ALL wine cellars capacity is less than 29 bottles of you are storing a variety of wines. I agree with other reviewers that the instructions are less than thorough. After some googling I learned that the larger plastic tray fits in the inside bottom for spills  the other tray is for desiccant in case you are in a humid area  worried about mold. Still haven’t figured out what the rectangular rubber piece is for.  So far so good.