I bought the 9 tray for myself as I was expecting a huge crop of veggies. I've been dehydrating foods now every week. I love the product as it works very well, seems to supply even heat and air exchange to the product being dehydrated and works in the amount of time suggested. The capacity is perfect for large amounts of food, and even with small amounts I can use every other tray. I sit my bread on the top to rise while it's running. The heat generated is perfect for not too fast rise. I like it so much I have purchased another as a holiday gift.
I've heard a lot of good things about this dehydrator so I finally retired by 24 year old ($**.**) dehydrator for the new 2900 9 tray dehydrator. I'm not impressed with the quality of the trays. The trays seem flimsy and the dehydrator is loud while in use. I think I should have checked out other models at a lower prices.