The product itself is very good and I got this with 1 year Service Warrantee(this means free service for 1 year except for any parts that may need to be changed).
The service personnel does not show professionalism, usually arrives after too many follow ups.
I had a repetitive complaint of reduced pressure in Hot water flow, service personnel came and found no fault. I called them twice in 2-3 months time and ended up with no fault found in Geyser.
Fedup with that I called private plumber who opened the hot water outlet and cleaned the salt accumulated inside the tank through that opening. This was never attempted by AO Smith service personnel.
Also do not purchase the water hoses from AO Smith service personnel(in some model it came along with the Geyser), they give low quality with same price tag which you can find in market for better quality hoses.