Recommended if you travel. There are sticky cases for luggage.
Also recommended if you want a cheapo GPS lost-car/stolen-car system, although it isn’t perfect for that. Or a lost-pet system, provided they don’t go out into the woods.
The only annoying thing is replacing the battery every year to 15’ish months. Thankfully, they are button batteries that are like $3 for a 20 pack, just don’t buy the coated kid-safe button batteries.