Hello Lisa,
There is no simple yes/no answer to this one.
It depends what you want it for and on the size of the bulb, the efficiency of the hand powered generator, and the capacity of the rechargeable cells in the torch, not to mention the type of bulb or LED.
I keep one as an emergency torch in my car, but they are not as convenient as conventional battery torch when camping, as much as anything the noise of having to crank the handle is a disturbance when using a tent.
Still it does mean that we know when our Cubs are having a midnight feast!