I think he's overrated when put on the same footing as his contemporaries Roy and Hasek. Other than in that specific situation, he isn't.
How so? He's always regularly rated behind those 2. The only people who would put him equal or above them are the seldom few who look at his career wins total and judge him to be the best because of that. And they seem to be in the minority IMHO.
From what I have read by the experts, hockey analysts, fans, etc. are that Roy and Hasek were clearly better overall.
But then again, I always believe a case can be made that Brodeur could be considered as good as Roy, as there is always a myth that Roy played behind much lesser teams in Montreal, including those who say the Canadiens had "no business" winning the Cup in 1993, especially when comparing that very serviceable & underrated '93 Canadiens defense to that of the Devils Cup winning defenses featuring Stevens & Niedermayer.
But then again, 93' Canadiens defense was much better than the 2012 Devils defense, in which a 40-year old Marin Brodeur came within 60 minutes of forcing a Game 7 in the SCF with their best forward in Kovalchuk playing with an essentially broken back in those Finals for all intents and purposes.
I still have a feeling that even if the Devils had won that Cup in 2012 with that AHL-quality defense, Brodeur detractors still would have made up excuses to lessen him and he would still be considered way behind Roy and a lot, but not all, of that has to do with the prestige & glamour of having played for a much storied and glamorous "O6" franchise that had a history of legends as opposed to a small-market team that is a subset of a larger market, that essentially had no real storied history or legendary players, both
before and
after Brodeur's entire career, consistent attendance issues and a reputation for being "boring".
A fair question to ask would be if that Brodeur, Stevens & Niederamyer all played for the Toronto Maple Leafs for example and that team won 3 Cups in 9 years, would Brodeur be held in higher regard and standard than he is now or be looked at the same way? I definitely think the former and not the latter IMHO. It's a fair question.