Quite often I'll buy an album, listen to it a few times, then put it on the shelf until I listen to it again a few years later. Periphery II is one of those special albums that I still listen to on a regular basis. It's a bit more accessible than the first album which some may see as a good point while others not so much. I see it as a different album and should be approached as such.
Spencer has definitely improved - his growls/screams have much more substance and his clean melodies are just beautiful. The instrumental aspect of the music is just as good, containing many elements of 'traditional' Periphery and Bulb (Make Total Destroy) along with a more melodic side (mainly heard in songs such as 'The Gods Must Be Crazy!' and what was originally a Haunted Shores song 'Scarlet').
If you liked the first album then you'll probably like this one as well, and while hardcore prog purists may find some of the songs a bit too 'commercial' (and I use that word as loosely as possible because PII is far from it) there are plenty of songs that you will still enjoy. Overall a brilliant album and one that every self-respecting Periphery fan should buy!