I have 2 of these and both have given good service for the 2 winters I have used them. Easy to fill, but a little tricky to get going, as it isn't immediately obvious that they are burning.
They give off a nice gentle heat and run for a few hours. Ideal when standing around in the cold.
They are a good quality build which I have come to expect from Zippo. I did have some reservations about fuel leaking out of them, but that has never happened. It still strikes me as odd that I am burning fuel, it is in my pocket and there are no flames - dark magic if you ask me, but hey it works!
Just be careful where you put these. There is a warning of low temperature burns and I am witness to this. I had one in my pocket and thought nothing of it as it wasn't hot. A day later I had a very sore and red patch on my thigh. It is not about the sudden heat, but prolonged raised temperature contact, especially on parts of your body that are not so toughened to the environment.
Bottom line - high quality Zippo product. Does what it promises with minimal maintenance.