Pictured below is my dog, Buddy, having dinner from an elevated food Bowl. I like elevated feeding stations for dogs with megaesophagus, osteoarthritis and cervical disc disease. In my experience, elevated feeding stations also work well for dogs with anxiety. They seem to feel less vulnerable when standing.
Unfortunately, a study performed at Purdue College of Veterinary Medicine, found that elevated food bowls might be associated with a greater risk of gastric dilation and volvulus (also referred to as bloat). Other risk factors include increasing age, family history of bloat and eating rapidly.
Source: Glickman, L.T., et al, Non-dietary risk factors for gastric dilation and volvulus in large and giant breed dogs, J Am. Vet Med Assoc. November 2000: 217(10):1492-9.