[This review was collected as part of a promotion.] Received this for Christmas (Dec 2019) and have used it a half dozen times so far. Does a great job getting a good sear / crust on meat and nice crispy edges on French toast. I've had zero problems with either food sticking or rust appearing.
Cast iron always has to be fully pre-heated before putting food on it, or it will stick. Meat releases, as expected, when the maillard reaction has sufficiently occurred.
Cast iron also must be always thoroughly dried (in a hot oven or over burners) after washing or it will rust. Lightly coating it with some neutral oil after dried is good too. Can't hurt to do some extra seasoning either.
(Also, any rust can be scrubbed off with steel wool and salt and the cast iron re-seasoned, if rust does occur - though, if handled correctly, it shouldn't rust at all.)