As per mileage the tvs jupiter is less than equal to the honda activa. May be mileage of the jupiter is low due to material used in the jupiter is of high strength thats why the own weight of the jupiter is more than the honda activa. Conditions of road may also cause the decrease in the mieage of the tvs jupiter.
As come to comfort the tvs jupiter have good suspension system but the seat is less comfortable than another brands of scooter. Suspention system are hydraulicaly based attached to front wheel and the coil spring type suspention system in the rear wheel.
Yes, this scooter is reliable. As not the best but good fuel efficiency and good suspention system. Some improvement like on pickup and accelration should be done in future and also it provide with phone charging port in future upgrade of its model.
The jupiter have the disc brake in its front wheel and drum type in rear wheel. Which makes it slightly uncomfortable for the road grip and off road conditions. Jupiter use its own company type which are of tvs brand of all weather grip.
At last, my personal opinion is that it is only suitable for light trafic or medium trafic and also have some low pickup accelration.
