I have been using this blowtorch for a couple of years now and have found it very practical as well as easy to use.
Filling with butane (not supplied with the product) is straightforward - the nozzle on the canister fits easily onto a thin tube fitted into the base of the blowtorch. I check one has been correctly inserted onto the other by moving the butane canister gently sideways; if it moves, it isn't on properly, so I have another go. You get a feel for when the blowtorch has been sufficiently filled from changes to resistance and I normally stop in time, if not, a small amount of butane spills out and you can feel the cold but it doesn't hurt and quickly evaporates off.
The length of the flame is controlled via a dial on the top and the flame is ignited via the red button on the side.
I was wary using it at first but gained confidence fairly quickly, helped by the fact that the black ribbed plastic ensures you keep a firm grip. It also feels reassuringly sturdy, without being too heavy. Whilst it is not really an essential piece of equipment to have in the kitchen, it makes life a bit easier and I have no regrets about buying mine, even though it does not get used every day.