I.X.
I can tell you that a lof of my colleague interior designers use them for their personal projects, but not on their professional ones. Why? because they are stylish and affordable. When the budget allows, designers use custom and semi custom cabinets always! When the budget does not allow (and designer don't make a lof of money), they are supper styling! However they are limited because they are prefab sizes. not all spaces are ideal for working with modular and prefab sizes. Sometimes people lose a lot of storage because perfab sizes are a bad match for their particular space.