I like Best Press (Linen Scent) mainly for the smell. I don't think it is much of a starch, as steam would probably work just as well on any wrinkles. However, people swear by it so your mileage may vary. And the Linen scent is good enough to make me iron sheets for the first time in my life!
Stayflo is great (you can control the strength), as is the heavy duty Faultless in a can. I also make my own out of boiling water, corn starch mixed well with cool water to add to the boiling water and vodka (prevents mold - even potato vodka isn't a starch) at the end. If you use a cheap, flavored vodka, you get a nice scent as well. I don't mind any flaking as I glue baste and have to wash everything anyway.