The way I'd describe Lunarsea would be similar in tone to the Scandinavian bands in this genre but the writing of the music is actually quite unique. They seem to infuse quite a lot of different elements into this. The guitar takes on different styles at different points, from the melodeath that this band is classed as to using riffs more reminiscent of groove metal (a bit of an unusual mix, but they make it work). That's not the only thing they switch to, with thrash featuring occasionally and even something that could be described as similar to gothic/doom on In a Firmness Loop Day. The drums also switch to match the guitars, which is always a good thing (imagine doom themed drums in a speed metal track or vice versa - it wouldn't work). Vocals are mostly growled in a way that isn't dissimilar to Johan Hegg of Amon Amarth, but there are some cleans that find their way in here at various points. Thankfully they aren't overused and they always seem very fitting, a lot like the keyboards that are very well utilised across the entire record.
The best parts of this are album are definitely the melodic choruses that crop up in most songs, although that can be said for most melodic death metal albums. Some of the verses are a little bland are consist of the same chords almost on loop, but sometimes that's necessary. At least they don't spend too long without having something interesting to attract my attention. Nonetheless, I do find the songs with more interesting melodies than repetitive riffs better than the others.
Because all of the songs are slightly different stylistically it makes it hard to compare the good to the bad, but I found the aforementioned In a Firmness Loop Day quite enjoyable as well as Infinite Process One. Those two are more laid back than most of what I'd normally like, but I found them to be the most enjoyable. As previously stated the first of these two songs takes on some sort of slow gothic feel, which actually comes off far better than you might think. I'm not really sure how to describe Infinite Process One other than say that it's melodic and features quite a lot of cleans, but also really fast and intricate drumming. Unusual combo, but it works quite well in my eyes.
It's certainly an unusual album and doesn't really follow the pattern of most bands, so if you're in the mood for something different then this is something to consider. You have to enjoy quite a variety of genres for this one to really get the full experience, but I personally found it a very nice record to listen to.