It's called "Monkey Diving" or "zero buoyancy diving" depending on who you talk to. It's much more maneuverable than regular scootering, and because there's not a lump of stuff on your back, you feel much more a part of the water.
Without a BC, a more skilled approach to weighting is required; you weight yourself so that you're slightly positive at the surface, but below ~15', the suit compresses enough that you're neutral. This frees you from constant buoyancy adjustments that would come from a BC, which adds to the freedom.
It's kinda like skilled minimalism.
...And fun!
All the best, James