They've been very popular for as long as my memory goes (Crack the Skye release). Certainly not underrated.What's with all the sudden hate for Mastodon? They seemed pretty underrated to me and apparently in the span of a week now they're "Overrated" and "Just cookie cutter garbage"....people realize they've been around for nearly two decades right?
I've always been lukewarm towards them but from what I've heard they kind of moved away from metal on their last few releases so that's probably what people are complaining about.