TERRIBLE! - WON'T GO THROUGH FINE NEEDLE EYES!  DIFFICULT & FIDDLY TO THREAD & CAN CUT YOUR THREAD!
I'm going back to the sort with the thin wire!  These are almost as, if not more, difficult to use as threading the needle without them!  They would not go through my extra fine needles and even cut the thread on my regular needles.  Betting the thread to stay around the tiny hook while you pull it through is irritatingly difficult!  I have requested a return of these and ordered the sort based on the old wire needle threaders, but attached to little plastic flowers instead: https://www.amazon.com/gp/product/B08LZ5M3MK/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&th=1  (They will surely be better than these!  I always had good results with the wire sort and hope the plastic will keep the wire better attached than the aluminium used to.  Also, the flowers look cute!)