I bought this a few weeks ago and I loved it. It is perfect for cooking everything, from meats and fish to omelettes and pancakes. Also as it can be used in the oven it is amazing for upside-down cakes, pies, and corn breads.
However, if the instructions are not properly followed, things can go wrong. First of all, it needs seasoning for better results. This process has to be repeated two or three times at first, and then whenever necessary depending on how you use it. Although, I loved using this pan, I have to admit that the seasoning process takes some time and the kitchen smells really bad for a couple of hours. When properly seasoned the pan forms a non stick surface, but it is best if you only turn food after each side is sufficiently seared so it will not stick. It is very unlikely that this pan will rust, however you must be careful not to leave it in water.
Also, I can see that some reviewers had a problem with the fact that it is very heavy and it gets really hot. Indeed it is heavy and it gets extremely hot, but that is to be expected as it is a cast iron pan. If you don't want a heavy pan (about 3 kg) don't buy this one. I know I am stating the obvious, but it is not a good idea to hang this pan on the wall, drop it on your feet, or hold it with bare hands when cooking.
I have been using it for weeks on an electric hob and oven with great results. Highly recommended!