Overall, I think my Volt is a great car. It has a battery pack (16 kwhr) that can store 40-60 miles driving depending on the temperature. It also has a old fashion gas engine that provides over 300 miles on a full tank. When I am just going on errands around town, I rarely use gas. When we frequently in pre-Pandemic Times took trips to San Ramon to see our children and grandchildren, I could almost get there on a full charge. Then, if we stayed overnight, I could charge up and get gas so the whole trip was almost all electric. Now that we are not staying overnight, the round trip averages about 120 miles/gallon as we come back on gas.The car will switch to gas by itself, but you can select options that dictate it use gas instead of electricity. When on "gas" the car gets about 45 miles/gallon.
Unfortunately, GM isn't making this car anymore. I think the cost of the fancy transmission (it must switch between electric and gas power) and both a gas engine and an electric motor simply makes the car unprofitable.
All that said, the car is really fun to drive. It has great acceleration. With the seats down, the trunk can hold a lot of stuff. When the car switches between electric and gas (i.e., the battery is depleted), there is no perceptive change in driving. The gas engine makes a very slight noise (electric motors are essentially quiet) and there is a little less power.
