Colleagues, tell me, please!

If I select a Nexus 5 phone to install UBPorts, what should I look for?
Release time, unlock of some features, version of Аndroid?

On the site, for most supported phones, warnings about unlocking are indicated, but for Nexus 4-5 - not.

Please tell me what you need to pay attention to when choosing the phone instance, so that later do not have problems with the installation?

Thank you in advance,
Ogogon.