It wasn't bad, it just wasn't great. In their defense, all I've heard from them is Sol, not the full-length, so I wasn't familiar with the material they played.
I have the Fell Voices s/t. I've Only listened to it a couple times to be honest, but from my recollection is was pretty good. I'll have to give it a proper re-visit.
Listened to Velnias - RuneEater last night. Bit of a departure from Sovereign Nocturnal but still quite enjoyable. Really felt like the album became much stronger about midway onward.