I have briefly used both lenses (14, 85).
If you are lucky and get a good sample, it works very well. However, it is a kind of lottery as Q.C. never was the strong side of the company which makes these (or re-branded) lenses. Opening up the lens (I did with the 85) discloses why the lens is cheaper than the native Nikkors.
Thus, if you take a chance or it's easy to return a lens, and you are careful about the lens, these can be economic alternatives. Do keep the caveats in mind, though. There is no free lunch.