I purchased this for drying 3D printer filament, and for this purpose it is perfect! the ability to dial up a specific temperature, and have it run for a set time (with the timer) means I can dry various filaments, and renew silica gel packs. The fact i can also put the trays back in and make jerky, dried fruit, leathers etc is simply icing on the cake. The trays are pretty basic and very serviceable. If you're going to do leathers or fine herb drying, invest in some silicone sheets to make your clean up easier.