Those were the times when my usage was considerably high and owning a diesel car was inevitable. Bought the Ritz VDi in 2011 June. Superior White color. My general usage was aprox 1200 - 1500 kms a month.
The car had always performed really well both in the city & in the highways. The main thing which i liked was the height of the car. the ingress and egress was super easy & so was the driving position; thanks to the height given. Till date there is no Hatchback car that offers such good height in Diesel Version.
The 1.3L 75BHP DDis engine performed reasonably well. Nothing much to complain except for the slight virbation/Noise unlike their Petrol VTVT engine. I was easily getting around 15KMPL in City limits and 19 - 21 in highways.
Owned the car for close to 5 years and drove over 60000 kms. Never had any major issues as such apart from the regular wear & tear.
After i sold my Ritz i was amazed to find that Maruti discontinued such a nice car to make way for IGNIS (Which really hasnt impressed me; except for its interiors)