I am using hibernate to map an object that has string properties that are mapped to NVARCHAR columns in table in sql server (same applies for oracle). Should I assume that if the driver that I am using has support for automatically taking care of i18n data, I don't have to do anything extra while inserting, updating, querying on string column, loading the objects ?

Hibernate uses prepared statements and if the drivers have support I should get back right results without any change in my code. Can someone confirm this?
I am using jsqlconnect driver for sql server2005 and oracle10g thin driver for oracle. Both driver vendors claim that they support i18n data

Has anyone been using NVARCHAR type columns and any lessons learned from this? any mistakes that I should avoid.

Thanks in advance,