The one condition that you should absolutely always follow is placing the feeder as far from its litter tray (or sandbox) as possible. Otherwise, your cat might very well refuse eating, and it won't be the feeder's fault but rather its location. A quiet place such as the kitchen is ideal for your feline's feeder.
If you also have a canine friend living with you, make sure to put the feeder in a high place so that it cannot gobble your cat's food too. Direct sunshine will alter the flavour of the fats and should therefore also be avoided. This last point is particularly important if you use an automatic feeder that keeps food for a week or more.