Originally Posted by postal packin' mama

I actually prefer the taller ones (I have four sizes & use all of them) as some things will bubble up into the vent; but the squattier ones (is that a word?) are invaluable, to me, too.
The taller ones are great for when, for example, your roast is pretty much done, you can put potatoes, corn, etc., on top of it in a steamer basket or just whole and pressure cook them right in the same pot.
The site "missvickie.com" has lots of good info plus recipes.