What is the best push notification service for Ionic?


Hi all and @mhartington,
Currently, I have an app that requires push notification feature. I found this doc http://ngcordova.com/docs/#Push But It’s quite complicated and requires Google/Apple dev account…
Is there some others push notification service that works well for Ionic/Hybrid and easy implement?
How about https://www.pushwoosh.com/ http://www.pushapps.mobi/ or Telerik Backend Service (Everlive)?
Let me know your idea and what push notification service are you using?