The buttonless center console is a little weird. And it is a little small inside compared to your G. Otherwise, its decent.
Since the lease rates are so tempting, I say go for it if don't mind how it drives and the math pens out.

Also, I *think* you can still get solo HOV lane stickers. But with the Volt, only specific VIN groups qualify. http://www.arb.ca.gov/msprog/carpool/carpool.htm