Just my 2 cents, the Excaliber is a pretty good dehydrator.  I experimented with a friend's model before buying a 5 tray unit for myself.  Should have gone for the 9 tray for making meals for larger groups.  Get it with the teflex sheets for doing leathers, soups, and stews, etc.  Like lotalota says, easy to clean and use, dries fairly evenly (though I switch my trays around a couple times in each drying, as well) and comes with or without a timer on current models.