Talk:Master Yi/@comment-4900160-20130806230451/@comment-1330314-20130806231805

Youmuu's is good on Yi, but there are several reasons one wouldn't buy it:
 * Its armor penetration is unnecessary, as Yi deals a lot of true damage.
 * is more gold efficient overall, has better crit chance and attack speed even with Youmuu's active up, and permanently grants passive movement speed. Its passive is also very good.

Though Youmuu's would be good as a final item, I personally prefer raw damage items, as the attack speed bonus can actually go over the cap and thus become inefficient.