Features:

Join FULL GAMES (Even if the lobby is full)*
DIAMOND coloured name to show your swag!
Exclusive premium only hub access!
Extra high quality bandwidth and efficient routing (lower latency)**
EARLY ACCESS to new games before anyone else!
Access to '/togglerank' command in game to look switch appearance between regular and diamond coloured name.
Access to '/scramble' your stats in select game modes such as Survival Games.
Your vote counts for more in games! (3 compared to the normal 1)
Even more:

50 friend slots (normal players get 10)
Premium rank on our TS server - more information.
Premium rank on our forums - more information.
Friend join / leave notifications.
Chance of joining exclusive Hive events like 100 player Splegg and BlockParty***
Hub Wardrobe! - Get to choose what you wear whilst in the hub.
Warm feeling in your heart for keeping us running!