Upgrade php 5.6 to Php 7.0?

Hello, I've got a server running several web applications, on a famp stack apache 2.4 as the a. It's running Php 5.6.30. On a test server I just noticed it's compiling and installing Php 7.0 with this application i'm working with. My question is from a security perspective and from a user perspective (compatibility and new features), is it and upgrade path that should be taken 5.6 to 7.0? I've got many many extensions on my 5.6 box and want to ensure as smooth a transition as possible. I'd appreciate hearing from users who have made the upgrade. Thanks. Dave.