PLANNING TO BUY THE SMT VARIANT OF BRIO

HI,  HAVE PLANNED THO BUY THIS CAR THIS MONTH, MAY BE ON THIS FESTIVAL DAY. HAVE GONE THROUGH THE REVIEWS AND PROS AND CONS , I'M MORE CONCERNED ON THE FUEL COMSUMPTION( MILEAGE) HAVE HEARD ABOUT THE MILEAGE IN CITY LIMITS OF THIS CAR, ANY INPUTS FROM THE USERS WOULD BE USEFULL. ANY SPECIFICATIONS TO BE LOOKED INTO BEFORE TAKING THE DELIVERY ?  AND WHAT ABOUT THE SERVICE EXPENSES HOW BIG IT WILL BE ON MY POCKET. :) ? SPARE AVAILABILITY AT DEALER POINTS. ETC. ?   GUYS GIVE ME SOME USEFULL TIPS FOR SAFE AND ENJOYABLE DRIVING   THANKS RAJENDRA