Love, love, love this pot. It is a substantial size and is a great addition to my three other rectangular Corten steel planter boxes.  Interestingly, this planter did not patina as much as my other planters.  I used the same mixture but I could tell it was going to be a bit darker than the other planters.  I'm hoping it will continue to patina naturally over time to match.  This size planter has one large drainage hole in the center.  It seems big enough to prevent any drainage issues that I tend to worry about.