The ring is very well made and taking care of my two previous Canon lenses as "a glove". The handling is quite simple, it just screws and finished. The feel is not just plastic excessively, but as though it were made of metal (Is it made of metal?). In any case, the ring is very tight on the thread and not loosen this is so can not be solved with filter change just like that. Even the matching series filter holder fits quite simple and it remains stable on the adapter ring.
So far I have used in too little more to say about it, but if there is the possibility that, I will report in more detail about it!