It's heavy and shitty at cooking almost anything that isn't meat. I've used well-maintained 20 year old cast irons. Eggs stick. Tofu sticks. It cooks vegetables no better than a nonstick or a stainless. Completely overrated.
I don't know what cast iron you've been using but I can cook eggs and pretty much anything else just fine in cast iron without it sticking. I basically just leave it in my oven with a light coat of oil on the inside after cleaning it so it gets seasoned whenever I bake something.