Yun polearm is not very good choice imo (no crit, no const), t1 pvp is superior to it. t3 craft is superior to t1 by a lot. 13 dps is significant and with crit gem its bit over 2% crit rating which is nice. Only comparison to it are t3 pvp and t4. And all of those does the job. Crit rating is its forte but pvp t3 has its advantages, mainly const.
Like Kalston said, its ugly and dont bother with it if you can get pvp 10 one.