OpenSSH is the premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking, and other attacks. In addition, OpenSSH provides a large suite of secure tunneling capabilities, several authentication methods, and sophisticated configuration options.
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Pros
Pro The Reference SSH Client
If you find samples or tutorials about SSH, they almost always refer to OpenSSH. It bascially defines what SSH is.
Pro One of the most trustworthy development teams on the web
The development team of OpenSSH is part of the OpenBSD ecosystem. Their implementation is basically today's technical reference for any SSH client.
Pro Available on virtually any platform
MacOS. Windows. Core component on any Linux flavor.
Pro Standard implementation that documentation for all other tools assumes you have installed already
A lot of other tools (e.g. git) are based on this for file transfer.
Cons
Con No host list
Has no functions to manage huge numbers of hosts.
Con No way to organize SSH connections
No way to organize SSH connections.
Con Command line tool
It can be difficult to use from a command line interface.