Highway driving I get about 25 to maybe 30 miles if I really baby it. Just straight up driving 70 (these have an 80mph top speed), I get about 22 miles. For city driving (less than 40mph and lots of stopping), I've gotten as much as 37 miles, but I was really going for the best range I could. Typically, my city mileage is 30 miles.
The light should be a steady green when the charging has completed. When the emission cycle begins, the engine turns on almost immediately. If you were charging, the gage would read about 2/3 - 3/4 full because the battery can't regen if it's 100%, so the system limits the power to 80% (I think) so it can regen while the generator (the gas engine) is running. Once the engine has been driven for the required amount of time, the generator will turn off and you should be on EV only. During this time, your battery charge should have remained the same. Once the battery charge reaches 20%, the generator will kick back on.
Jim