I am user of this scooter since 6 months. So this is a detailed review of my vehicle which would guide you in a better way.
Firstly about Mileage: In scooters, I think access 125 is one which gives best mileage.
Its 45-50 in city and 50-55 on long routes.
Then comes performance: The feel when you ride this vehicle is fantastic. Engine run like butter.
Comfort: Its best. Shocks are really smooth.
Maitanance: Access125 spares are cheap compared to other scooters. But I think it has least maintainance.
Finally service: The best part is service from showroom. After each service the feel of ride is amazing
So dont think and go for this.