It's very stable on mac, and it's the first release:-) You can reach the same results with modo painting system, but they work on different approach. My workflow:
-model in modo
-export to 3dcoat to create UV (without watching the wires of the model)
-paint in 3d coat or modo (it depend on what i need)

3dcoat export lwo files very well, so the integration with modo is perfect.

-TOXE