I have only needed to actually find something once since attaching these to various items, I put one in my sunglass case and needed to find it at the house, the precision finding arrow was useless and when I played the sound, I could barley hear it through my sunglasses case, if I didn't know approximately where to look, I would not have found them using the sound. Now granted the AirTag was in my case but I had a Tile Pro in there before and it was way louder!
I also do not like the way the sound ramps up as opposed to just playing full blast from the start, they probably do this for battery life. The sound does not play for very long either.
I will say that that Apple is known for releasing superior products/features but thats not the case here, if the precision finding worked off cell towers, that would be more Apple like.
The one missing feature that I'm disappointed has not been included at release, is the geo fence. I would like to be alerted I'm leaving the house without my wallet or sunglasses.
I just pulled up Find My and it does show the location of all my items so I will keep the AirTags because I like that better than a separate Tile app that has to be running in the background