Refrigerators Discussions

Looking for a new fridge-space is limited so would consider French Door Kitchen Aid but love the look of the Sub-zero glass door fridge?freezer.  Would love to upgrade in kitchen as great resale & would buyif i knew anyone that has had a sub-zero fridge? Need to know repairs?, exp or frequent.  Know it is one of smaller fridges--21.5 cu ft for both freezer & fridge but have French door fridge in our pantry on same floor as kitchen. Any input on this line??