Finntroll has recently evolved into a Humppa-metal band, focusing all their folk elements into a distinct polka style. Recently, along with Korpiklaani, this fun style of upbeat polka metal has gained a numerous amount of fans. Your mileage may vary on how well the songs work, but altogether it's really a fun blend and worth a listen.
Granted, a lot of the melodies are pretty basic to say the least, and there's nothing really innovative going on here. Fintroll shows on Nattfodd that they've found their niche as a metal band that loves to polka, and they don't seem like they're going to change any time soon.
Depending on your point of view, this is some of the most fun music you are going to encounter in your life, or merely an annoying gimmick that's plaguing metal. Altogether, this is not going to change the way music is headed anytime soon, but it's still a worthy contribution to the world of metal.
The songs are quite melodic and catchy, and the distorted guitars put an extra kick in the "oom" for "oom-pah". Sometimes they're fast paced and goofy like "Eliytres", incredibly catchy and midtempo like the single "Trollhammeren", or dark and folky like "Nattfodd". They mix together on the album well, and each section is distinct.
Also prevalent is the theme of trolls in the album. While the non Swedish-speakers aren't going to pick up the lyrics anytime soon, it does seem to be prominent in the ambient spaces between songs, most notably in "Marknadsvisan", where most of the song seems to be the noises of drunken trolls stumbling around, the last part erupting in an enraged and humorous fight as portrayed by blasting drums and guitars.
Overall, this isn't the greatest album of all time. It is catchy when it needs to be and has it's place in the music scene. For those looking for something fun, catchy, and quirky in their music, Nattfodd is the album for you.