Quick and convenient eyecup

I have tried this eye cup for the simple reason that they should be bigger, which I was advised by my Vorrezensenten. At my Olympus E-420 it replaced since the original, and in fact this eyecup is good size (see of me is interposed comparative image), significantly more voluminous and thus also "softer" than the one supplied. All of this comes the convenience clearly contrary, incident light is better shielded and the eye socket must not be significantly compressed against what the original eyecup first sometimes resulting in a headache for me. A trifle, however, I noticed the rubber has some rough surface and thus collects fine dust quickly.
Due to the accuracy and the low price an absolute buy recommendation on my part.