Some of the problems I've had before buying this remote controller :-
1) camera moves on tripod when pressing shutter release.
2) tripod falls over (honestly, once!) when pressing shutter release.
3) camera shakes when taking long exposure time shots.
4) many pictures of my bum as I try to beat the 3-second shutter release delay while getting myself in the picture.
All cured with this tiny gadget. An excellent accessory and so simple to use - there's only one button! And with a battery life of 30,000 operations (so the bumph says) it'll probably last longer than I will!
Only problem is it's size (52 x 22 x 6 mm).
Far too easy to lose. :-)