I have already tried flash socks because they are very inexpensive. But alone, the application and removal is nevertheless essential fummeliger compared to this "cap". Resetting the zoom when attached cap is certainly also a point on which we should consider before buying a product alternative. This one makes it audible.
About the price might annoy, yes, but what you are for the other photo equipment (body, lens, filters, tripod, etc.) look like? Here quality has its price. You can tell it to use and to the fit. And there is to my knowledge no equivalent alternative, only this portion remains.
For all except absolute opportunity Blitzer, my buy recommendation!