Tried a Vass out for the first time a couple weeks ago. K1 plastic. 172g. Fairly soft and a bit gummy and grippy. Initial thoughts are that it looks and feels like a Destroyer, but with a very slightly shallower rim.
Very nice flier, and the flight numbers (12, 5, -1.5, 2) are dead on. The Vass definitely has a "beat in Destroyer" flight. It'll pop up flat from a hyzer release and drift right a bit. Better than average glide. Fade is late and gradual. The Vass can definitely be overthrown, and isn't really a driver for strong headwinds.
The Vass gets downrange well, and with seemingly little effort. I had no problem cranking it over 400' on fairly low hyzerflip lines. Easy disc to master and throw effectively quickly. No steep learning curve.
Summary: The Vass is a 12 speed driver that flies like a somewhat beat Destroyer. It has moderate turn, good-great glide, and a late, subtle fade. Excellent hyzerflip disc that will stay on a fairly straight line (no big S curve). Similar discs include the Charger, Enigma, Crank, Grym X, etc. Perfect disc for people who want a bit more turn and less fade than a Destroyer provides. The Vass can be thrown for big distance, but can occasionally bend right a little too much. Not a good driver for strong headwinds. Honestly, this disc is everything the Time Lapse should have been.