For awhile there I looked forward to various Oktoberfests that US Breweries would put out... SN, Sam Adams, Leinie and a few others. Eventually I tasted authentic Marzens from Hacker-Pschorr, Paulaner, etc. and realized that the US versions are often too sweet as has been mentioned in this thread. A more authentic version is drier, crisper and breadier and that good bread flavor (and most of the color) should be coming from good, dark Munich malt like Weyermann, Best Malz or Avangard. Depending on how much color a beer like that has, I could see some American breweries saying that they could just get that color from crystal malt but that would be a mistake if you wanted to make an authentic version of it. That said, some US breweries do make a nice Oktoberfest and honestly... Leinie's version is not bad. It's not as dark or sweet as some of the others. I made a Festbier/Oktoberfest/Tent Bier about six weeks ago that is super simple: 65% Pilsner, 35% Dark Munich (mine was Avangard), one addition of Spalt Select for about 25 IBUs from the start of the boil and 2124 for the yeast. Simple, crisp, balanced, bready. Looking forward to tapping it in a couple weeks here.