Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It grows on you

You can see the theme of Tuonela on the cover of the album, which shows a withering leaf. Most of the songs are about the decline of things, with a lot of autumn and winter imagery. So it's a little mournful, but with spirit rather than weepiness. Musically it reminded me a little of Metallica; reasonably heavy and not too complex, but it doesn't get very repetitive and the riffs are to support the lyrics rather than being the only attractive part of the music. The lyrics are very intelligent and imaginative, and with a little rewriting by a native English speaker they could have been truly poetic. This is one of the few metal albums I wouldn't be embarrassed to be caught singing along to.