I own both. Gen 2 is a worthy upgrade imo. Both generations have been reliable for me thus far. I have 23k miles on the gen 2 and haven't had a single hiccup. The gen 1 (53k miles) has been flawless until two weeks ago when it developed a clicking noise from the left front wheel. They're replacing the driver side axle this week under the powertrain warranty. I'd trade in the gen 1 for a 2nd gen 2, but I'm wanting to go full BEV on the next vehicle and I'm waiting for GM to offer ACC and Moonroof options for the Bolt.