As usual with ArmA, it's how you play it. I have it and it seemed ArmA-like enough for me. I didn't continue with it though just because it's still in early development, plus it is really a fund-gathering and engine development mechanism for ArmA4 development. As such I'm willing to push money to BIS for this to happen. Also, it's a head-start in the new modding environment, if you're into such things.