I have been using Chef as it helps me to automate my applications in configuring and getting deployed in my web network easily.
It has got various features such as Chef Management console, Chef Analytics, and Client Reporting. It helps me to keep my server up all the time and saves up a lot of time in this area.
It also allows me to keep the track of my applications in terms of version control. So, the applications remains in synchronization with the help of different versions available for each built.