Where Psiphon fits
Use it when exploring a connectivity tool for a specific access problem.
Check before you choose
Read the privacy and traffic-routing documentation rather than treating it as interchangeable with every VPN.
Find the right edition
Start with the destination for your device or the publisher's website. Use the current requirements and terms there to confirm the edition you need.
Compare the workflow
Some tools provide internet access through a provider, some require a server configuration, and others connect your authorized machines together. Choose the connection model first instead of treating every product as the same kind of VPN.