I would say close your eyes and buy it.
The reviews I saw here about mileage, I can't believe. Overall I am getting 15 KMPL and in highways at 18 KMPL. I am challenging the mileage. The only thing is that you have to drive first few thousand Kms between 50 to 60 KMPL. If you start driving new vehicle at more than 100 KMPL, there is no point on complaining company or car for low mileage. All performance of your car's future depends on how you drive the first few Kms. Hope this helps you in your decision making.