I bought this pan as I was looking for something I could use in both the oven and on the hob and liked the idea of not ingesting and inhaling PTFE.
I hadn't used bare cast iron before so didn't really know what to expect. The first few uses were a disaster, whilst it says pre-seasoned, it still needs to be seasoned properly a few times before using it. I started by following the instructions of just getting on and using it to try and develop the seasoning but every time that I used it, food stuck that required a lot of elbow grease to remove and probably damaged any seasoning build-up that had developed. What I ended up doing was to bake it in the oven with a layer of oil multiple times and start using it as a baking tray for greasy things like oven chips.
Three months of regular use onwards, it now has a thick layer of seasoning that has made the surface of the pan almost totally smooth, a stark contrast to the sand cast rough texture it started with, it also has excellent non stick properties.
The trick seems to be to use a thin wipe of vegetable oil before use and to preheat the pan, doing this it is now my daily omelette pan and can be cleaned with a dry piece of kitchen towel, or just by pouring some tap water in whilst still hot and rubbing with a washing up brush.
It becomes an excellent and versatile pan, it is just as non stick as a tefal teflon pan I have (and no longer use), can be used on the hob, grill and oven. It is easy to clean and for omelettes and steaks it cannot be beaten.
Downsides are the handle gets very hot, it weighs a lot, requires a bit more attention than non stick pans to begin with (although now it just requires a bit of oil) and I don't like others using it for fear of them washing it out with soap :) .