I've had experience with it in SteamVR, but I haven't tried out the workshop tools yet. I'll probably try them out once I buy HL:A this summer. I don't have any VR equipment, but I don't care at all.
I absolutely love Hammer 5 / Source 2 Hammer / Hammer 2.0 / whatever you call it. (canonically should be Hammer 5, but let's just call it Source 2 Hammer to avoid all confusion)
I love it, I love it, I just love it. I'd have sex with it if I could. It's just such a good piece of software.
I don't need to pull off 6 brushes to make a room any more. I can just invert a cube! And then do stuff to that inverted cube. Also, arches are so God damn easy to make now, as well as curved tunnels. Carving is GONE, too. I LOVE THIS SO MUCH!
Let's say you got this thingy here: And you want to convert this, like, diagonal piece into an arch.
You'd just delete the 4 faces between them (this is all 1 "brush"), select the two edge loops, hit Bridge, and BANG! I can tell you, we've just entered a new age.