transactional replication qestion

Hi,

I am planning to setup transactional replication on one of our databases. I did some research and found the following limitations/conditions with setting up transactional replication on a database:

1. Each table needs to have a primary key
2. Schema changes won’t be reflected in the “destination” database
3. Certain types of operations won’t be allowed on the “source” database(not sure what those operations are).

Is the above list still accurate? Any advice would be highly appreciated.