I don't have the Oly adapter lenses, but I did get similar lenses for a Sony DSC S-70. With adapter rings these lenses were used on a Sony V-1 and now with my SP-350.
The lenses significantly extend the reach of the camera. Though you are hauling around a lot of extra stuff. The adapter lenses don't have much zoom range. So the camera becomes mostly fixed at the maximum 1.7 mag for the tele or 0.7 for the wide angle.
The lenses block the on camera flash, so an external (hotshoe) flash is necessary for flash photography. An external flash, especially used for bounce lighting, can really make these little digital cameras shine for indoor portrait shots. This also extends the camera's battery life since the internal battery isn't powering the flash.
These accessory lenses require the Olympus CLA-9 adapter tube. This tube will partially block the internal flash. Offsetting this is that the CLA-9 adapter tube will protect the lens. You can even put filters or magnification lenses on it. The threads on the CLA-9 adapter are 34mm diameter. Step up adapter rings are available. You can use these, even in combination, to adapt larger diameter filters.