We really like the 300 but the only model we could find in the period of supply chain disruption was the ADA model. Instead of full 3rd (top) rack you only get a mini track that can hold a couple of knives. The description is not always clear on this. 

The holes in silverware tote are a little small and don't fit many kinds of silverware 

NYT Wirecutter ranked 300 series (not ADA model) at top buy which is reassuring. 

Dries perfectly when Rinse Aid is used.