Since the above Olympus cameras without lens protection come along, this adapter is a strong recommendation. Apart from the actual CLA-T01 adapter which protects the lens by its higher edge, the package is a real lens cap on, which can be clipped on the CLA-T01, as you know it from other lenses.
Of course it would be great if the part was not expensive as sold extra accessories, but attached to each TG-X, but you should know that before you buy, as you know the price, so I will not be incorporated in a product rating such things.