All of the sudden, the first impression is an obvious one... something is missing. Even departing for the listening with that obvious idea in mind, it's inevitable to feel it, specially when and if already accustomed to the vocal version. Despite that and of effectively thinking that the vocals from Andy Doran, in the case of the project Heifervescent are fundamental, I can't help, but feeling that these are also extremely easy listenable and even quite enjoyable. In fact, after a couple of listening experiences, it seems to gain a personality of his own and somehow complementary.
And since one does not preclude the other...