The ease-of-use of Unity's Networking plus the performance and reliability of the Photon Cloud.
Photon Unity Networking FREE: this package is all you need to easily add multiplayer to your games and launch them globally with the included FREE Photon Cloud plan.
Note: You can export to all Unity platforms with Unity 5.x Personal/Pro. In case you use Unity 4.x you need Unity Pro orPhoton Unity Networking PLUS (PUN+) in order to export to iOS and Android.
Low learning curve: The PUN API is very similar to Unity's networking solution! Always connects: Works across different (mobile) networks, no punchthrough issues. Convertible: A script ports your Unity Networking project. 90% work: Done. Global low latency: Photon Cloud's hosting centers in US, Europe, Asia (Singapore, Japan) & Australia provide low latency for your games all over the world.