My experience with Juniper Security actually revolves around a legacy piece of software known as the Junos Pulse. I've recently discovered that this software has actually been acquired by another company, but I'm still using the Juniper-branded version of the application.
What this allows me to do is to easily VPN into a private network that contains access to various repositories of source code for development projects. The software is simple, discrete, and works perfectly.
The Junos Pulse client that I use on both Windows and OSX has fully met my expectations, so there is really nothing I dislike.
It seems as if Juniper Security products offer a lot more than just a private VPN integration. If you are particularly looking for the Junos Pulse product I mentioned in my review, you should look elsewhere since another company has acquired this product (more here: http://www.juniper.net/us/en/pulsesecure/).
This piece of software has allowed me to securely and privately access code repositories that are behind a corporate VPN.