It IS very similar to BKool; I used that for a while (I have a BKool trainer) but got fed up with the totally hopeless software and ditched it for Zwift some 18 months back.
I've become disenchanted with Zwift in that I'm starting from the same spot and riding the same (cartoon) roads day after day. I'm using BigRing as well but that puts too much emphasis for me on big climbs which I just cannot do. This looks to be rather more varied but the video quality is still pretty good. And I like the little Google Maps insert....if they could give you the facility to put it on a separate screen that would be brilliant.
Anyhow, I'll do the 14 day trial and see what I feel after that.