I've been for 2 weeks (04th Feb to 17th Feb) in Westin Chennai and they were all welcoming and delightful.
Room condition was always in crisp and clean.
Comparing with Park Chennai and Hyatt regency Chennai, I would definately choose
Westin Chennai.
In terms of distance from civic center, hotel located little far from city center.
However, hotel also serves car services with reasonable price.