We ordered three of the large 13.5x11x11" pendant lights for the dormers in our great room.  The size is perfect for making a statement on a vaulted ceiling, and the vintage style has the farmhouse aesthetic we desired.  I plan to order two more (in the smaller size) for above our kitchen sink and entrance area (both sloped ceilings).  
FYI - despite the claims in the FAQs that these lights can't be installed on a sloped ceiling, that isn't true.  My husband, who is a construction engineer and carpenter and has decades of electrical installation experience, says it will work fine on sloped ceilings.  It has flexible wire, not a rigid downrod, and can adapt to hanging on a slant.  I originally skipped on ordering this due to this incorrect information in the FAQs.