Destiny Xur update: should you buy Gjallarhorn?

Gjallarhorn, the most elusive weapon in Destiny, is in your reach this weekend. Xur has answered the prayers of many and actually brought Gjallarhorn with him. Gjallarhorn, one of the game's most talked about Exotics, can be yours for a mere 17 Strange Coins. But the question remains, is it worth it? The answer is