I've tried to use
/search? a few times, and I didn't get the results I was looking for.
I personally find it quite more convenient to use google instead.
/search is, by default, mixed with other related questions and answers (I know about
is:question, and I think it should be the default). Almost always there's a relevant SO question on the first positions.
Is it me misusing the search engine, or is someone else getting the impression something is not quite right with it? It doesn't seem to rank according to views, votes or duplicates linking to it.
I asked this after seeing a question on SO ask for this very same subject. Don't know if it's related to the engine
/search? uses, but when asking a new question with these words, that question in particular doesn't even appear. This could be possibly letting obvious duplicates get asked (it's also true that if the asker didn't bother to google his question, he is also unlikely to be bothered looking for it in a list with Questions that may already have your answer).