Ive been listening to Rammstein for a few years and have grown to be a huge fan, and a lot of the songs off of Mutter helped with that. Many Rammstein fans will tell you that Mutter is Rammstein's best album, its hard to disagree. The songs that stand out the most to me are Sonne, Mein Herz Brennt and Links 2-3-4. Sonne is personally one of, if not my number one favorite Rammstein song in existence (along with Stein Um Stein). The first half of the album really hits hard, with the last half being more sexually driven. The riffs are simple, but very effective.
Overall, this album is definitely in the top 3 best Rammstein albums. I would easily recommend this to anyone, especially if your in the mood to headbang.