The integration with our application was very easy - they have great documentation which helped us get up & running quickly! We are using pubnubs push notification feature as well but I can't say that we've found any disadvantages so far regarding this one either (we haven;t used all features yet). If you're looking into integrating your mobile app or website then look no further than PUB NUBS!! They will work closely alongside during implementation process helping solve issues along way through out development cycle I like that this provides me with an easy way to be able to send information at any given time. This application has made my life easier when needed, as well as being able to share information with others. There are not many downsides to this program, however sometimes if you go down the wrong path you will need to take a step back. Use this software! The benefits far out weigh all problems. Easy to use.