This is a high quality food dehydrator that is simple to use because of the digital control and the top heater and fan. I wouldn't even consider a food dehydrator that does not have the top heater/fan. This one does not need to have the trays rotated during use and also heats to the recommended 160*.
I have had my Nesco American Harvest FD-1020 for a year and have used it so far only to make ground beef jerky, but I've given it extensive use for that. I cook the meat at the 160* setting for approximately 6 1/2 hours, but the amount of time varies by the ambient humidity. I set it outdoors to use and when in southern Arizona, if the meat slices are thin, 6 hours was sufficient. In Texas, I have needed to leave the meat cooking for 7 hours. I don't care for the smell of the cooking meat, necessitating the outdoor use.
For ease of cleaning, I recommend purchasing the clean-a-screen mesh sheets for each tray, Nesco American Harvest MS-2-6 Clean-A-Screen Plastic-Mesh Dehydrator Screens, Set of 2. Also, buy at least one additional set of trays, Nesco American Harvest Add-A-Tray for FD-1000, Set of 2. Buy a set of the mesh screens for each set of trays. Only a single mesh screen comes with the dehydrator. Do be careful to order the correct trays and screens for the specific model of Nesco deyhdrator.
I'm the type who wants detailed instructions, and the included instructions are poor. I finally had to dive in and give it a try when I didn't know exactly what to do. After experimentation, for the ground beef jerky, I use one packet of the Nesco Jerky Spice Works, hot and spicy flavor, plus a teaspoon of ground cayenne pepper to 1 1/2 pounds of 96% lean ground beef. It is easy to make the jerky strips using the Nesco BJX-5 American Harvest Jumbo Jerky Works Kit. For 6 lbs of meat, I needed 8 trays, and they were totally filled. Perhaps it would be better not to crowd the slices, but mine has worked OK and I want to make lots of jerky when I'm going through the trouble of making it. I store the jerky is an airtight container in the fridge or in sealed bags in the freezer.