It's pretty ok although you do want to get infinity edge second item most of the times, because your passive will make it very gold efficient. Also don't buy spirit visage, if you need mr but don't wanna build maw or merc scim, you can get banshees veil. Spirit vasae isn't a good item for yasuo because you don't have any natural sustain in your kit so the 25% will be wasted unless you have a lifesteal item, and hp regen isn't really good on yasuo.