Has anybody tried these? Were the results any better than buying regular sized lily bulbs?

I have not tried these but they might be similar to B & D's "private harvest" bulbs. I imagine they might have slightly taller stems and higher bud counts the first season, but a lot of it depends on your growing conditions, too, not just bulb size. Let us know if you decide to try them and what the results are!

I'm thinking about getting their extra large bulbs of Invasion this fall. It's so warm here in winter lilies seem to grow even when they're supposed to be dormant. So if I decide to get them I'll let you all know how it goes

Lilies never go truly dormant. They are always trying to grow above ground or under ground.