Main problem is that by default android devices are tracking lost tags only in crowded places like airports. Only the devices where their users changed the default are contributing to find the tag anywhere else.

Now, I made a game with my friend on how easy it would be to find an hidden airtag and I found out that in a crowded indoor place is almost impossible to find it. Because of no GPS and limited reception each phone reported a very different coordinate and it was jumping everywhere. I wasn’t able to find it at all. Instead, when it was hidden in a park, I went exactly where it was shown in the map, waited for the iPhone to connect to it, make it sound and follow the directions: found!

So, a tracker that works only in crowded airports and malls is wasted money IMHO. Nobody is changing default settings and the notification that Google sent to change the default to everyone was even “scary” for a non-technical: dismissed/ignored by everyone

If the goal is to find your stuff, is better the airtag, if the goal is to stalk someone and just get some approximate location, then this stuff can be ok