I am fan of Honda card and two-wheeler. I decided to buy Brio SMT over i20 magna mainly because of features and performance. Also, i20 mileage with in city is 9 and I thought Brio will do much better. I drove 900 km and am done with first service. I get only 8 km with AC in Bangalore traffic and not sure why its soo less.
Brio Cons list:
Poor city mileage with AC on.
Boot space - You cannot keep more than two bags.
Shifting gears - not at all smooth.
Review update - 26/jun/13 :
Thanks for all the response. I followed your suggestions and now mileage is better, still not good.
I drove to Chennai twice and did my second service two weeks back. Now, I am getting 10 km with A/C in city. Gear box beeding has been done for shifting gear issues and now the shifting is okay.
I will post my feedback after third service. There is lot of pros and very few cons, so just go for BRIO:)