The only ILS classification I know is CAT I, II or III a, b (and c)
I didn't/don't know about other ILS classifications. Please enlighten me.
I will look at the published airport charts and the notams to know the status of a particular ILS. In the absence of notams, I will suppose that the ILS is performing as published as soon as I hear the ATIS or ATC telling me that low vis ops are in progress. Only if the ILS is not performing as published would I like to be informed about that by notam or atis (and/or atc).
Is this what you wanted to know about my (lack of) knowledge?