I Have Ciaz A/T since March 2017 driven (1lack 6thosand km) till now.
Suspension wise very Comfortable much comfortable than our Honda City Aspire 1.5 A/T (city very pathetic car 1.5 engine doing 0-100km/hr in 13 sec)
But remember if you want most comfortable car then non of Above (Ciaz and City) Can compete with comfort of a Proper sedan which is Corolla.
So get yourself a brand new Corolla Gli 1.3A/T. You will love it.