The Vios is a spry little car.
I've driven a friend's Vios (1.5G) and compared it to my (ancient) Cefiro.
Handling is fine, typical of FF lightweight compacts. There's a bit of understeer when forced into tight turns.
Acceleration is OK, enough to outsprint taxis and untuned EK-series Civic VTIs.
Gas economy seems fine. After all it's a small car!
Styling is OK. It looks a lot better than the old Vios units from 2007 or so. Looks similar to Korean competitors though.
It just feels a little cramped for me. Driving a Cefiro means being used to having a lot of headroom, leg room and space at the back. The Vios being a compact has very little of the 3.