First of all, look for the + and - marks and you'll be fine. I got it wrong at first too, as there are springs at the bottom of the battery compartment, which usually mean the negative end of the battery, but not in this case, one side has the batteries the other way round.
I bought two for our first family camping trip, and they worked well.
One click turns on the torch end, second click turns off the torch and turns on the 3 LED side, then the third click lights up both LED sides.
Pretty bright for a £2 torch, and the clip at the end is good. I clipped it to the top of the tent bedroom for the kids and left one side on all night for them, I used cheap £1 batteries and they lasted two nights.