They were really interesting in the middle of 90th. I like "Sperm" (94) and espesially "Winkund" (96), with its powerfull riffs and soundtrack-like keys intros. They are, in some way, anticipated Rammstein, but their music was more complex, "rich" than R.
However their later albums like "Ego" are not interesting at all, imho. This is typical MTV-style alternative bubblegum, so I stopped buying their new albums 5 of 7 years ago