But as a forgetful person, I got a pack of four on the day they were released. I used one when shipping an important, time sensitive and expensive item to a client. It was a huge value compared to the usual tracking of packages. I could see exactly when it moved from customs to an airplane, and surprisingly the location even updated in flight! I used and am still using this data, many times to confirm when the item was actually on the way or not, and if related travel and work can be done or not. It's saved thousands of dollars.
Another time, I was just about to board a train from Paris to Luxembourg when my iphone notified me that I left my bag behind (at a cafe in the station). I bought 8 more after that and put them in anything of value I have the experience to leave behind somewhere. Bags, ski boots, glasses case, inside the ear cup of my good headphones. Come to think of it, I should put one in my work notebook. Early in my career I had a work trip to sketch all of the dimensions of some heavy machinery so I could automate it (replace actuators and control them with an added PLC). I lost the notebook and had to go back, which was probably a $20k mistake in travel costs + not working on other projects.