My new favorite distance driver. I'm a beginner/intermediate player, MA50, and max out at ~ 330ft. So YMMV. The flight is amazing for me. Thrown flat, it will stay flat while drifting right, before fading forward. I'm getting 320+ frequently, and with pretty tight lines. I have not turned it over, even once, although I haven't thrown any anhyzer lines except with strong tailwind. I've played about 20 rounds so far, with 168g and 174g weights.
I can throw the Expanse straight into a 10mph+ headwind, and it will hyzer flip to flat, drift right, and fight out late just like the -2 2 numbers suggest. When I accidently threw it flat into a headwind, it drifted right and kept drifting (until it crossed a four lane street, haha) but it never turned over. I love that I don't have to worry about accidently cut rolling into a headwind. It's definitely more stable than my Halo Maya, another favorite of mine, but which I would even think of throwing into a strong headwind.
I had also bought a Trail a couple weeks prior, to test the hype. Other reviewers (on Youtube) found the Expanse slightly more overstable than the Trail, but that was the opposite of my experience. This Expanse is what I hoped the Trail would be, right out of the box. I'm not dismissing the Trail, as I've heard there's some inconsistency from disc to disc, and I suspect the Trail *might* beat in and fly similarly to my Expanse. One thing all the viewers agreed on was the Expanse landed 20-30 feet beyond whatever discs they were comparing it to, Trail included.
