I've flown acro with the SV. Now you have the ability to cancel the "arrows" pointing to the horizon when in unusual attitudes (Thanks Dynon!!!).
The SV will stay with most maneouvers however it tends to get lost at when there is a combination of roll and pitch at high rates. So for instance, it gets lost on the back side (during the roll) of a cuban, or gets lost in the hammerhead.
That said it takes just a few SECONDS to align it self once you go straight and level. The SV really self errects automatically and fast.
For me doing acro, there are three things I want to see on the scree: G-meter, airspeed, altitude... the rest don't matter and I get as I'm looking outside.