I had a couple of dehydrators several years ago. One was one of those round plastic stackable tray ones like in your link. Not the exact same. I did not like it. If I used more than 2 trays or larger pieces of fruit, it would mold. I could get it to work if I dried the fruit out in the oven for several hours on very low heat, with the door open. Just wasn't worth it. I ended up giving it away.
It looked like this
Russ
The one I liked is more like this one, but the front doesn't come off, there are 4 shelves/drawers.