Serious Eats features the Excalibur in the Gadgets section.
The editor starts as most of us probably did. "I never thought I needed a dehydrator. I mean, I can buy prunes...um, I mean dried plums, at the grocery store. Dehydrators are large. They're not something you'd keep on your counter all the time, and unless you have huge cabinets, storage might not be convenient."
She then goes on to explain the benefits and even so much as say get more use from it by using it to proof dough, re-crisp crackers, dry pasta, or incubate yogurt—pretty much anything that needs a reasonably stable temperature. If you're in a market for one, this unit's got a lot going for it.