I have the Bolt XM revotron for 4 years now and done about 40000 kms.
Its a lovely car which was not marketed and advertised properly.
The downsides are mileage and tata service in kolkata.
The upsides include, space, solid body, good A/C, torquy engine with good punch. Turbo feels good. Harman kardon 8 speaker system is outstanding.
Tata should have not pitched on the same grounds as the taxi.
Finally, although people might say it looks like an improvised vista, I must say plent of people have actually liked the shape and design.