I bought our first car which was Santro xing years ago and its still in good condition except for 1-2 repairs for damages. I have not encountered any major problems till now.The dealer was very helpful when I bought it from showroom.
It has enough legroom for a person of height upto 6'2. I am 6'0 and my head nearly touches the roof of the car when I sit on back seats.
Its mileage is around 10-15kmpl which is quiet ok. It's looks were best in the section when it was first released in Indian market.
I have not encountered any major problems so I would say it is very reliable car.