I’ve read several books in the Objectivists library, including Atlas shrugged, the fountainhead, and the virtue of selfishness.
For a certain kind of person, I do think they have value in showing a different ethical/moral framework. To wit, if you have been raised on the principal that you must always sacrifice your own happiness for others, then Onjectivist philosophy is quite novel and can actually be helpful in moving towards a more self-actualized thought mode.
For most others, however, it can turn you into a raging a-hole.
In terms of how tenable the overall principles are in practice, just remember that Rand herself went on social security.
The least death could do is take a pull. What a wheel sucker!