I've thought about getting one for some years, but I finally sprang for one.
One of the big reasons is for making treats for Seren and, with Castle Key, for his Leonbergers, as well.
We're training the pups using a method that requires a LOT of treats. One of the favorites in the Leonberger community is pieces of hotdog, sprinkled with garlic powder, and microwaved until they're jerky.
I figure why go microwave and just use a dehydrator. Big advantage to that is you can make a LOT in a batch.
I also want to dry fruit, especially apples and peaches, for use during the Winter. My Grandfather used to make dried applies, known in the German community in Pennsylvania as schnitz, and my Grandmother made a fantastic dried apple pie with them.
Who has a dehydrator? Other than beef jerky, what's your favorite stuff to dry?