Whatever brand you buy make sure it has a circulating fan if you want versatility. My experience has been that for heavy use the brands mentioned don't hold up over the years. Excalibur is a good brand for longevity, but it does cost a bit. For those without access to a dehydrator, it is possible to use your oven if you have a gas or convection ( use the fan settings). Just put it on the lowest heat, and walk away for hours.